I'm back again after a long silence - work continues to be bonkers, so I don't have much time for reading (or Mumsnetting) at the moment. I'm still reading this thread when I can, though, and very much enjoying your reviews!
I've got a bit of a review backlog, so I'll do a quick update with half of them now, and then (hopefully) catch up with the others later today:
69. The Vanishing Half by Brit Bennett
Not much to add to the lovely review by Palegreenstars above! I read this for a book club, and I stand by my earlier statement that it is a very book clubby book, with lots of juicy issues to get your teeth into. I don't normally enjoy books like that (I'm the one running a mile when Jodi Picoult is suggested for our next meeting!), and I had very mixed feelings about this book. On the one hand, the writing is really, really good - it was a pleasure to read Bennett's prose and I would definitely give her books another go. On the other hand, some of the characters and events felt as if they were there solely to make a particular point, or to complete a neat pattern. For example, introducing Reese as a trans character was evidently supposed to add to the debate about Identity (capital I because it was such a major theme, exhaustively treated throughout the novel). But the unquestioning acceptance of Reese's self-identity actually undercut the main message of the book (that you are what you are, and that you can't identify out of your birth). At times, it felt almost like a fairytale or fable: the twins, the extreme opposition of the cousins in appearance and temperament, and so on. I also (personally) found the discussion of race frustrating and slightly unnuanced, but I think that is because I am a (mixed-race!) Brit reading a book that is about peculiarly American histories and attitudes. For example, the book implicitly (as far as I can see) accepts the "one-drop rule". I find the toxicity and rather black-and-white nature (no pun intended) of US discussions about race really wearing, but this was an enjoyable and thought-provoking addition to the debate.
(Needless to say, our book group discussion of this book went exactly as you would expect. When I expressed some mild reservations about this book, I was told earnestly that this was just my white privilege speaking - which would have amused my brown-skinned, African-born DF! I was told that, even though I'm technically mixed-race, I'm light-skinned enough that I don't really "count" as such - which kind of proves Brit Bennett's point, I guess 
).
70. The Organised Mum Method by Gemma Bray
The Organised Mum Method (TOMM) is the only system that has ever helped DH and me to bring any sort of order to our house. We rather fell off the cleaning and tidying wagon in the chaos that was lockdown 1/homeschooling/working from home, so I read this in an attempt to work up some enthusiasm for doing structured housework again. It's not rocket science, and there isn't much in the book that isn't already on her website, but Gemma Bray is a likeable and practical sort, and her system really works for us. (People who aren't total housekeeping dunces probably won't get as much value from it.)
71. The Mystery of Henri Pick by David Foenkinos
A small-town library in Brittany houses an archive of manuscripts that have been rejected for publication, inspired by a Richard Brautigan novel (this rang all sorts of bells for me and, after racking my brains, I've decided that it's also in Mr Penumbra's 24-Hour Bookstore - can anyone confirm this?).
I picked this up because it's the first in a series by Walter Presents, and I'm a sucker for a good Belgian or Danish mystery. This is slightly oversold as "a fast-paced comic mystery enriched by a deep love of books" - it's pretty short, but I wouldn't exactly describe it as fast-paced. It didn't quite live up to the hype, but was mildly entertaining, with some good twists. The twee footnotes throughout, and the author's habit of using "..." to express a quizzical silence from a character were both pretty annoying, though.
72. Maths on the Back of an Envelope by Rob Eastaway
A fun, easy-to-read book about estimation, probability and strategies for working things out without a calculator, and for arriving at an answer that is both sensible and "near enough". If you've ever idly wondered how many hairs are on someone's head, or how many planes there are in the sky at any given moment, this is the book for you.