I read cozy and historical mysteries, a bit of Paranormal/UF, and to mix it up, I read science and gardening books on occasion.
As the author states at the beginning the book's purpose is to give the reader reasons to be joyful, or at least smile. As such, this is a book of 50 short essays about the different joys of books: owning them, reading them, giving them, shelving them. Defacing Writing in them.
The writing is a bit flowery - think G.K. Chesterton lite - but still (or because of, depending on your feelings about Chesterton's style) a joy to read. My personal favourite was "Sneaking new books past loved ones" as I found that one a tiny bit more relevant than the others. ;-)