Read this with Kinnell but gave up about half way through, neither of us was feeling it.
It's a book about a kid and his talking, time-traveling cat. They visit different historical eras (Ancient Egypt, Feudal Japan, etc) and...not really solve problems? Just kind of visit, meet some people, get semi-involved in cat-centric situations, and then take off? It's all kind of low-stakes, when things get hot they just move on to the next era. The portraits of the different historical cultures aren't outright problematic, but felt slightly dated in places (dated like 1960s, not dated like 900 AD.).
I was fine with the author not explaining the mechanism through which all cats can apparently time-travel, I was more hung up on how the cat speaks English.