Yesterday Is History by Kosoko Jackson

Weeks ago, Andre Cobb received a much-needed liver transplant.

He’s ready for his life to finally begin, until one night, when he passes out and wakes up somewhere totally unexpected…in 1969, where he connects with a magnetic boy named Michael.

And then, just as suddenly as he arrived, he slips back to present-day Boston, where the family of his donor is waiting to explain that his new liver came with a side effect—the ability to time travel. And they’ve tasked their youngest son, Blake, with teaching Andre how to use his unexpected new gift… Read more.