Waiting for a new baby is hard, and waiting for her to grow up into a playmate is even harder. Luckily Liam's Nana is just downstairs and always ready help. When the two of them build a Get-Older-Faster Machine, Liam is surprised to find it's not Sophie who does the most growing up.

Sarah Ellis has written more than twenty novels and picture books for young readers. Nominated in 2016 for the 2017 Astrid Lindgren Award, she has previously won the Governor General’s Award, the Mr. Christie Book Award, the Sheila A. Egoff Children’s Book Prize, and the prestigious Vicky Metcalf Award for a body of work. Written from her insightful memories of her own childhood and keen observations of the world around her, Ellis’ stories masterfully reflect her readers’ own experiences. She lives in Vancouver, British Columbia.