Before John Glenn orbited the Earth or Neil Armstrong walked on the moon, a group of dedicated female mathematicians known as "human computers" used pencils, slide rules, and adding machines to calculate the numbers that would launch rockets and astronauts into space. Among these problem solvers were a group of exceptionally talented African American women, some of the brightest minds of their generation.

This edition of Margot Lee Shetterly’s acclaimed book is perfect for young students. It's the powerful story of four African-American female mathematicians at NASA who helped achieve some of the greatest moments in our space program. Before John Glenn orbited the earth, or Neil Armstrong walked on the moon, a group of dedicated female mathematicians known as “human computers” used pencils, slide rules, and adding machines to calculate the numbers that would launch rockets, and astronauts, into space.

Valora Luck has two things: a ticket for the biggest and most luxurious ocean liner in the world, and a dream of leaving England behind and making a life for herself as a circus performer in New York. Much to her surprise though, she's turned away at the gangway; apparently, Chinese aren't allowed into America. But Val has to get on that ship. Her twin brother, Jamie, who has spent two long years at sea, is there, as is an influential circus owner, whom Val hopes to audition for. Thankfully, there's not much a trained acrobat like Val can't overcome when she puts her mind to it.

Girls in New America must have a chaperone with them at all times. Because of this, Stella is never alone. She can't go out by herself or learn about the world. She can't even spend time with boys except at formal Visitations. Still, Stella feels lucky that her chaperone, Sister Helen, is like a friend to her. And then the unthinkable happens. Sister Helen dies suddenly, and Stella feels lost. Especially when she's assigned a new chaperone just days later.

A world with no hunger, no disease, no war, no misery: Humanity has conquered all those things and has even conquered death. Now Scythes are the only ones who can end life - and they are commanded to do so in order to keep the size of the population under control. Citra and Rowan are chosen to apprentice to a scythe - a role that neither wants. These teens must master the "art" of taking life, knowing that the consequence of failure could mean losing their own.

Olivia Prior has grown up in Merilance School for Girls, and all she has of her past is her mother’s journal—which seems to unravel into madness. Then, a letter invites Olivia to come home to Gallant. Yet when Olivia arrives, no one is expecting her. But Olivia is not about to leave the first place that feels like home; it doesn’t matter if her cousin Matthew is hostile, or if she sees half-formed ghouls haunting the hallways.

Every seven years, the Agon begins. As punishment for a past rebellion, nine Greek gods are forced to walk the earth as mortals. They are hunted by the descendants of ancient bloodlines, all eager to kill a god and seize their divine power and immortality. Long ago, Lore Perseous fled that brutal world, turning her back on the hunt’s promises of eternal glory after her family was murdered by a rival line. For years she's pushed away any thought of revenge against the man - now a god - responsible for their deaths.

In a novel-in-verse that brims with grief and love, National Book Award-winning and New York Times best-selling author Elizabeth Acevedo writes about the devastation of loss, the difficulty of forgiveness, and the bittersweet bonds that shape our lives.

My name's Griz. I've never been to school, I've never had friends, and in my whole life I've not met enough people to play a game of football. My parents told me how crowded the world used to be, before all the people went away. But we were never lonely on our remote island. We had each other and our dogs. Then the thief came.

Eighteen-year-old Daunis Fontaine has never quite fit in, both in her hometown and on the nearby Ojibwe reservation. She dreams of a fresh start at college, but when family tragedy strikes, Daunis puts her future on hold to look after her fragile mother. The only bright spot is meeting Jamie, the charming new recruit on her brother Levi’s hockey team. Yet even as Daunis falls for Jamie, she senses the dashing hockey star is hiding something. Everything comes to light when Daunis witnesses a shocking murder, thrusting her into an FBI investigation of a lethal new drug.

Annie and Lee were just children when a brutal revolution changed their world, giving everyone—even the lowborn—a chance to test into the governing class of dragonriders. Now, they are both rising stars in the new regime, despite backgrounds that couldn't be more different. Annie's lowborn family was executed by dragonfire, while Lee's aristocratic family was murdered by revolutionaries. Growing up in the same orphanage forged their friendship, and seven years of training have made them rivals for the top position in the dragonriding fleet.

Medical student Amy Brenner is spending the night on a locked psychiatric ward. Amy has been dreading her evening working on Ward D, the hospital’s inpatient mental health unit. There are very specific reasons why she never wanted to do this required overnight rotation. Reasons nobody can ever find out. And as the hours tick by, Amy grows increasingly convinced something terrible is happening within these tightly secured walls.

After the first wave, only darkness remains. After the second, only the lucky escape. And after the third, only the unlucky survive. After the fourth wave, only one rule applies: Trust no one. Now, it's the dawn of the fifth wave, and on a lonely stretch of highway, Cassie runs from Them. The beings who only look human, who roam the countryside killing anyone they see. Who have scattered Earth's last survivors. To stay alone is to stay alive, Cassie believes, until she meets Evan Walker.

Aidan Thomas is a hard-working family man and a somewhat beloved figure in the small upstate New York town where he lives. He’s the kind of man who always lends a hand and has a good word for everyone. But Aidan has a dark secret he’s been keeping from everyone in town and those closest to him. He’s a kidnapper and serial killer. Aidan has murdered eight women and there’s a ninth he has earmarked for death: Rachel, imprisoned in a backyard shed, fearing for her life.

Raised to be my father’s weapon against the Coven that took away his sister and his birthright, I would do anything to protect my younger brother from suffering the same fate. My duty forces me to the secret town of Crystal Hollow and the prestigious Hollow’s Grove University—where the best and brightest of my kind learn to practice their magic free from human judgment.

Rogue hackers Petal and Gabriel are low on food and water. Their reputation precedes them and they are no longer able to hustle the crime community for supplies. With survival becoming harder, they’re left with no other choice but to accept a risky job from a dangerous individual. The two will have to negotiate with the Tinker - a woman whose reputation for psychotic behaviour is known across the nuclear-blasted Abandoned Lands; infiltrate a town overrun with killers; and recover a cache of exceptionally rare information.

Hotshot pilot Nax Hall has a history of making poor life choices. So it’s not exactly a surprise when he’s kicked out of the elite Ellis Station Academy in less than 24 hours. But Nax’s one-way trip back to Earth is cut short when a terrorist group attacks the Academy. Nax and three other washouts escape - barely - but they’re also the sole witnesses to the biggest crime in the history of space colonization. And the perfect scapegoats. On the run, Nax and his fellow failures plan to pull off a dangerous heist to spread the truth.

One cold, crisp night, Jack Sommers was faced with a choice - live forever according to the ancient, magical rules of Gaia, or die. Jack chose to live, and in exchange, he became a Winter - an immortal physical embodiment of the season on Earth. Every year, he must hunt the Season who comes before him. Summer kills Spring. Autumn kills Summer. Winter kills Autumn. And Spring kills Winter.

Captain Tess Bailey is in deep trouble. She and her crew are on the run, pursued by a tyrant who'll take them dead or alive. Tess's best hope is a tall, dark, and much-too-appealing stranger, Shade Ganavan, who says he can help her. But his motivations are far from clear. With the dreaded Dark Watch closing in, what Tess and Shade don't know about each other might get them killed, unless they can set aside their differences and learn to trust each other before it's too late.

Maisie Danger Brown just wanted to get away from home for a bit and see something new. She never intended to fall in love with a boy at space camp. And she certainly never intended to stumble into a frightening plot that just might destroy everything and everyone she cares about. But now there's no going back - Maisie's the only thing standing between danger and annihilation. She must become the hero the world needs before she loses her heart... and her life.

Solara Brooks needs a fresh start, someplace where nobody cares about the engine grease beneath her fingernails or the felony tattoos across her knuckles. The outer realm may be lawless, but it's not like the law has ever been on her side. Still, off-world travel doesn't come cheap; Solara is left with no choice but to indenture herself in exchange for passage to the outer realm.

Warning: The next terrorist attack on American soil is coming...sooner than you think. They can strike anytime, anywhere. A public landmark. A suburban shopping mall. And now, the human body itself. Three Middle Eastern terrorists have been injected with a biological weapon, human time bombs unleashed on American soil. They are prepared to die. To spread their disease. To annihilate millions. If America hopes to fight this enemy from within, we need a new kind of weapon. Meet Special Agent Jericho Quinn. Air Force veteran. Champion boxer. Trained assassin.

Seattle, 1913. Dorothy spent her life learning the art of the con. But after meeting a stranger and stowing away on his peculiar aircraft, she wakes up in a chilling version of the world she left behind - and for the first time in her life, realizes she’s in way over her head. New Seattle, 2077. If there was ever a girl who was trouble, it was one who snuck on board Ash’s time machine wearing a wedding gown - and the last thing he needs is trouble if he wants to prevent his terrifying visions of the future from coming true.

January 29, 2035. That's the day the comet is scheduled to hit - the big one. Denise and her mother and sister, Iris, have been assigned to a temporary shelter outside their hometown of Amsterdam to wait out the blast, but Iris is nowhere to be found, and at the rate Denise's drug-addicted mother is going, they'll never reach the shelter in time. A last-minute meeting leads them to something better than a temporary shelter - a generation ship scheduled to leave Earth behind to colonize new worlds after the comet hits.

Archaeologists Pippa Quinn and Charlie Jackson find advanced technology in undisturbed 16th-century graves. A portent, the discovery precedes thousands of giant sinkholes opening up across the globe as extreme weather threatens the population. Charlie suspects the two are related.

Eli knows corruption runs deep within the compound. It's a reality he's forced to confront every year on Bid Day. But when your job is to go out into the radiation-soaked Fringe so that others can live in peace, you don't ask too many questions. For Harper, the bid system works just fine. She's the best developer in her year, and she's confident she'll find a place among the wealthy, respected Systems workers. But when an upset in the bidding changes the course of Harper's future, she'll be forced to rely on an unlikely ally.

After decades hunting wanted offworlders throughout the solar system, Corporate Bounty Hunter Malcolm Graves doesn't bother asking questions. So long as the pay is right, he's the man for the job. And he always works alone. But when a high-profile bombing on Earth has Pervenio Corp clamoring for answers, they force him to team up with a strange, cyber-augmented partner. A young man more interested in statistics than instinct. Their assignment: Track down a suspected group of extremists from Titan who will go to any length to free their moon from the grip of Earth's corporations.

The strange planet known as Tanegawa's World is owned by TransRifts Inc, the company with the absolute monopoly on interstellar travel. Hob landed there 10 years ago, a penniless orphan left behind by a rift ship. She was taken in by Nick Ravani and quickly became a member of his mercenary biker troop, the Ghost Wolves. Ten years later, she discovers that the body of Nick's brother out in the dunes. Worse, his daughter is missing, taken by shady beings called the Weathermen.

Two days before the start of her junior year, 17-year-old Janelle Tenner is hit by a pickup truck and killed - as in blinding light, scenes of her life flashing before her, and then nothing. Except the next thing she knows, she's opening her eyes to find Ben Michaels, a loner from her high school whom Janelle has never talked to, leaning over her. And even though it isn't possible, she knows - with every fiber of her being - that Ben has somehow brought her back to life.

Devi Morris isn't your average mercenary. She has plans. Big ones. And a ton of ambition. It's a combination that's going to get her killed one day - but not just yet. That is, until she gets a job on a tiny trade ship with a nasty reputation for surprises. The Glorious Fool isn't misnamed; it likes to get into trouble, so much so that one year of security work under its captain is equal to five years everywhere else. With odds like that, Devi knows she's found the perfect way to get the jump on the next part of her plan.