An Academy Award‒winning filmmaker, drummer, DJ, producer, director, culinary entrepreneur, New York Times bestselling author, and co-founder of the Roots, Ahmir "Questlove" Thompson is the unmistakable heartbeat of Philadelphia's most influential hip-hop group. He is the musical director for The Tonight Show Starring Jimmy Fallon, where the Roots serves as the house band. Questlove made his directorial debut with the Academy Award‒winning feature documentary Summer of Soul. He has written multiple books, including the New York Times bestsellers Mo' Meta Blues, Creative Quest, Music Is History, and his first children's book, The Rhythm of Time. He is the publisher of AUWA Books, an imprint of MCD / Farrar, Straus and Giroux.

S.A. Cosby is a New York Times national best-selling and award-winning author from Southeastern Virginia. His books include MY DARKEST PRAYER, Los Angeles Times Book Prize winner BLACKTOP WASTELAND, and New York Times best sellers and Edgar Award nominees RAZORBLADE TEARS and ALL THE SINNERS BLEED. His short fiction has appeared in numerous anthologies and magazines.

A Junior Library Guild Selection
A 2024 Core Excellence in Children's Science Fiction Notable Pick!
Black Caucus American Library Association Best of the Best 2023 Pick!
An Amazon Best Book of the Month - April 2023

"A speculative adventure . . . [and] an engaging love letter to the '90s that gives way to a heartwarming story of love and support." --Publishers Weekly

"In this entertaining novel centering Black tweens by noted musician and filmmaker Questlove and bestselling author Cosby . . . time-travel hijinks and '90s rap references abound in [this] fun and funny series starter." --Kirkus Reviews

"There are many tense moments as Rahim attempts to keep his identity a secret and as Kasia outwits both her parents and government agents to try to come to Rahim's rescue and correct the timeline. . . Young readers looking for a fun romp will find it here." --School Library Connection