Could not put this down. Fantastic premise well-executed. I'm very pleased that I received this advance review copy from Netgalley in exchange for my review. Time travel and multiverse fiction can be hard to pull off effectively but I think this one gets it right. It spends more time on how our protagonist is affected than on complicated worldbuilding, and that approach works very well. I very much enjoyed that the perspective was mostly from a reliable observer, but sometimes the observer was not perceptive enough to tell the whole story. The big reveals were well-paced and plausibly based on the underlying premise.

It's been a disappointing run of sci-fi on TV lately with little character development and poorly developed premises. Refreshing to go back to books and especially this one. Jason is a compelling protagonist and I actually cared whether or not he'd find his way back to his regular everyday life.