Time for a Change

Book 2 in the electrifying middle-grade sci-fi trilogy by six-time Grammy Award-winning musician, Academy Award-winning filmmaker, and New York Times-bestselling author Ahmir "Questlove" Thompson and New York Times-bestselling author S. A. Cosby.

On the heels of their thrilling appearance in Rhythm of Time, best friends Rahim and Kasia are back traveling through time in Time for a Change. Last time around, they were on their own--now they are working with Aevum, a mysterious organization from the future that tasks them with averting disaster and safeguarding the flow of history.

The first assignment sends Rahim to Hawaii to recover a rock that Aevum insists is key to stabilizing the future. But things take a dramatic turn when he inadvertently jeopardizes the mission, thrusting him and Kasia into a web of intrigue populated by a diverse cast of time-travelers with their own enigmatic motives. There are doppelgängers from parallel dimensions. There are robots who may be allies but may be enemies. As Rahim and Kasia move like pinballs through time, they must navigate a treacherous path to unveil the truth and avert a devastating future across multiple realities.

Dynamic, richly written characters, a mystery that twists and turns through the corridors of time and the multiverse, interior illustrations, and crisp prose make for an infinitely readable sci-fi adventure that is sure to delight young readers.

Author: Questlove,S. a. Cosby
Publisher: Farrar, Straus and Giroux (Byr)
Published: 02/17/2026
Pages: 304
Binding Type: Hardcover
Weight: 0.82lbs
Size: 8.49h x 5.70w x 1.12d
ISBN: 9780374393175
Audience: Ages 9-12


Review Citation(s):
Kirkus Reviews 12/15/2025

About the Author

An Academy Award‒winning and EMMY-nominated 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 bestselling writer from southeastern Virginia. He is the author of All the Sinners Bleed, which was on more than forty Best of the Year lists, including Barack Obama's, as well as Edgar Award finalist Razorblade Tears and Los Angeles Times Book Prize winner Blacktop Wasteland. He has also won the Anthony Award, ITW Thriller Award, Barry Award, Macavity Award, BCALA Award, and Audie Award and has been longlisted for the ALA Andrew Carnegie Medal for Excellence.