Twelve-year-old Myrtle Hardcastle has a passion for justice and a highly unconventional obsession with criminal science. Armed with her father’s law books and her mum’s microscope, Myrtle studies toxicology and keeps abreast of the latest developments in crime scene analysis. When her next-door neighbor, a wealthy spinster and eccentric breeder of rare flowers, dies under mysterious circumstances, Myrtle seizes her chance. With her unflappable governess, Miss Ada Judson, by her side, Myrtle takes it upon herself to prove Miss Wodehouse was murdered.

On the morning Twain, a lonely boy with a knack for danger, discovers a strand of starlight on the cliffs outside of Severon, a mysterious curiosity shop appears in town. Meanwhile, Quinta, the ordinary daughter of an extraordinary circus performer, chases rumors of the shop, The Vermilion Emporium, desperate for a way to live up to her mother’s magical legacy. When Quinta meets Twain outside of the Emporium, two things happen: One, Quinta is sure she’s infatuated with this starlight boy. Two, they discover a book that teaches them how to weave starlight into lace.

It’s two months before Amelia’s big audition for the Mystwick School of Musicraft. If she gets in, she will learn to spin music into powerful magic - but her Gran has one last-ditch plan to persuade her out of it: sports camp. A week of softball, sprinting, and sweaty socks isn't exactly Amelia’s idea of a good time - in fact, she's deeply, appallingly unathletic. By the end of day one, she’s puked her guts out in track, gotten a black eye in no-contact flag football, and firmly established herself as the Least Valuable Player at camp.

It’s winter in the town of Eerie-on-Sea, where the mist is thick and the salt spray is rattling the windows of the Grand Nautilus Hotel. Inside, young Herbert Lemon, Lost and Founder for the hotel, has an unexpected visitor. It seems that Violet Parma, a fearless girl around his age, lost her parents at the hotel when she was a baby, and she’s sure that the nervous Herbert is the only person who can help her find them.

It’s 1911, and the young detectives of Taylor & Rose are turning their talents to espionage. On a case for the mysterious Secret Service Bureau, the daring Miss Sophie Taylor and Miss Lilian Rose must leave London for the boulevards and grand hotels of Paris.

Maeve Merritt chafes at the rigid rules at her London boarding school for “Upright Young Ladies.” When punishment forces her to sort through the trash, she finds a sardine tin that houses a foul-tempered djinni with no intention of submitting to a schoolgirl as his master. Soon an orphan boy from the charitable home next door, a mysterious tall man in ginger whiskers, a disgruntled school worker, and a take-no-prisoners business tycoon are in hot pursuit of Maeve and her magical discovery.

Windy Bottom, Georgia, is usually a peaceful place. Coop helps his mom at her café and bookstore, hangs out with his grandpa, and bikes around with his friends Justice and Liberty. The town is full of all kinds of interesting people, but no one has ever caused a problem...until now. And somehow, Gramps is taking all the blame! It seems like there are a lot of secrets that were buried in their small town after all....

The Impossible Postal Express is no ordinary train. It's a troll-operated delivery service that runs everywhere from ocean-bottom shipwrecks to Trollville and to space. But when this impossible train comes roaring through Suzy's living room, her world turns upside down. After sneaking on board, Suzy suddenly finds herself deputy post master aboard the train and faced with her first delivery - to the evil Lady Crepuscula. Then, the package itself begs Suzy not to deliver him.

Quick-witted, ambitious Ji Lin is stuck as an apprentice dressmaker, moonlighting as a dance hall girl to help pay off her mother’s Mahjong debts. But when one of her dance partners accidentally leaves behind a gruesome souvenir, Ji Lin may finally get the adventure she has been longing for. Eleven-year-old houseboy Ren is also on a mission, racing to fulfill his former master’s dying wish: that Ren find the man’s finger, lost years ago in an accident, and bury it with his body. Ren has 49 days to do so, or his master’s soul will wander the earth forever.

A monster stalks the gaslit streets of Edwardian London, draining the blood of the city's mediums. Lily Albright knows who's next. Lily is plagued by visions of the future she can never change. When a mysterious fiend threatens someone she loves, she's determined this time will be different.

The foggy streets of London's Whitechapel district have become a nocturnal hunting ground for Jack the Ripper, and no woman is safe. Flower girl Constance Piper is not immune to dread, but she is more preoccupied with her own strange experiences of late. Clairvoyants seem to be everywhere these days. In desperation, even Scotland Yard has turned to them to help apprehend the Ripper.

Tabby has a peculiar gift: She can communicate with the recently departed. It makes her special, but it also makes her dangerous. As an orphaned child, she fled with her sister, Alice, from their charlatan aunt Bellefonte, who wanted only to exploit Tabby's gift so she could profit from the recent craze for seances. Now a young woman and tragically separated from Alice, Tabby works with her adopted father, Eli, the kind caretaker of a large Boston cemetery.

As the age of the photograph dawns in Victorian Bath, silhouette artist Agnes is struggling to keep her business afloat. Still recovering from a serious illness herself, making enough money to support her elderly mother and her orphaned nephew Cedric has never been easy, but then one of her clients is murdered shortly after sitting for Agnes, and then another, and another. Why is the killer seemingly targeting her business?

When Triss wakes up after an accident, she knows something's very wrong. She's insatiably hungry, her sister seems scared of her, and her parents whisper behind closed doors. She looks through her diary to try to remember, but the pages have been ripped out. Soon Triss discovers that what happened to her is more strange and terrible than she could ever have imagined, and that she is quite literally not herself. In a quest to find the truth, she must travel into the terrifying underbelly of the city to meet a twisted architect who has dark designs on her family - before it’s too late.

Australia, 1906: Orphan Jane Piper is nine years old when philanthropist siblings Michael and Elizabeth Quinn take her into their home to further her schooling. The Quinns are no strangers to hardship. Having arrived in Australia as penniless immigrants, they now care for others as lost as they once were. Despite Jane’s mysterious past, her remarkable aptitude for mathematics takes her far over the next seven years, and her relationship with Elizabeth and Michael flourishes as she plays an increasingly prominent part in their business.