Welcome to the Grandest Game, an annual competition run by billionaire Avery Grambs and the four infamous Hawthorne brothers, whose family fortune she inherited. Designed to give anyone a shot at fame and fortune, this year’s game requires one of seven golden tickets to enter. With millions on the line, those seven players will do whatever it takes to win. Some of the players are in it for the money. Some for power. Some for reasons all their own. Every single one of them has secrets.

Avery Grambs has a plan for a better future: Survive high school, win a scholarship, and get out. But her fortunes change in an instant when billionaire Tobias Hawthorne dies and leaves Avery virtually his entire fortune. The catch? Avery has no idea why - or even who Tobias Hawthorne is. To receive her inheritance, Avery must move into sprawling, secret passage-filled Hawthorne House, where every room bears the old man's touch - and his love of puzzles, riddles, and codes.

For fifty years, King Leander Eldana has ruled Ashland without naming an heir to the crown. After sending away his grandchildren to be raised out of the public eye, it’s finally time to secure his nation’s future by appointing one definitive heir. The best way to appraise his successor? In the halls of Almus Terra Academy, a boarding school infamous for breeding the world’s next generation of leaders—and liars.

Sara Martinez is a hacker. She recently broke into the New York City foster care system to expose her foster parents as cheats and lawbreakers. However, instead of being hailed as a hero, Sara finds herself facing years in a juvenile detention facility and banned from using computers for the same stretch of time. Enter Mother, a British spy who not only gets Sara released from jail but also offers her a chance to make a home for herself within a secret MI5 agency. Operating out of a base in Scotland, the City Spies are five kids from various parts of the world.

Aiden Valentine has a secret: he’s fallen out of love with love. And as the host of Baltimore’s romance hotline, that’s a bit of a problem. But when a young girl calls in to the station asking for dating advice for her mom, the interview goes viral, thrusting Aiden and Heartstrings into the limelight. Lucie Stone thought she was doing just fine. She has a good job; an incredible family; and a smart, slightly devious kid. But when all of Baltimore is suddenly scrutinizing her love life—or lack thereof—she begins to question if she’s as happy as she believed.