Countdown to Yesterday by Shirley Marr (Simon and Schuster Books for Young Readers, 272 pages, grades 4-7). James is shocked to learn that his mom is moving out into her own apartment. As he struggles to navigate his new custody arrangements, he recalls “Things That Will Never Happen Now That My Parents Are Not Together”: six happy memories of his family that he wishes he could go back to and never leave. When he meets a slightly mysterious girl named Yan who claims she has a time machine, he’s ready to travel back to the way things were. At first, it seems like she can’t make good on the claim, but one day, she and James travel into an old photo of his dad’s. From there, they make plans for James to visit all six of his happy memories and decide which one he wants to stay in. But when he arrives at each one, he discovers details he had forgotten that reveal how unhappy his parents were before their breakup. Ultimately, James decides that the present moment is the only one where he–and everyone else–truly belongs.

I’m leaving out quite a few fun details in my summary: there’s an intense cake competition/school fundraiser, a class bully whose mother is James’s mom’s best friend, some interesting controversy over the David Bowie song “Space Oddity” and the fate of Major Tom, and the touching friendship between Yan and James, which explores the Chinese immigration experience in Australia. This book is by an Australian author, so there may be a few words or situations that are unfamiliar to American readers.

The Things We Miss by Leah Stecher (Bloomsbury Children’s Books, 288 pages, grades 4-7). J.P. heads to her neighbor’s tree house after her first day of seventh grade, looking for a refuge after enduring fat-shaming from some of the other girls and her gym teacher. What she finds there is a portal that allows her to skip over three days of her life. When she walks through the door, she emerges three days later, having been present to others but with no memories of anything that happened. She confides to her best friend Kevin, a fellow sci-fi enthusiast, about her time-travel adventure. At first he’s enthusiastic and works with J.P. to test various theories about the portal, but it doesn’t work for him, and as J.P. starts using it more to get through tough times in her life, Kevin pulls away, telling her that she’s not there for him the way a friend should be. Not only that, but J.P. starts discovering there are good and important parts of her life that she is missing out on. When she misses out on a crucial interaction with her sick grandfather, J.P. realizes that each moment in life is too important to give up, even if that means having to deal with the difficult times.

This story is thought provoking and will resonate with anyone going through difficult times. It raises interesting questions about life and would make a great book discussion read. I do always find myself poking holes in time-travel theories, and I also felt like a little humor would have been nice to mix in with some of the heavier topics. Takeaway for time travelers from both of these books: there’s no time like the present.