This is a challenging book to review.  Briefly - a clear, well defined multiverse book isn't easy to find. The rules of the multiverse were well laid out. The plot was good; the characters are well defined. It's well written. The audiobook is very well narrated. The love story is cute, if angsty and immature. The ending is satisfying, if predictable.

I just didn't care about any of the characters. I don't dislike them, I just don't care about them.

I liked it well enough not to abandon it, but I won't remember this in a month.