Book 13 of my #2018readingchallenge is a TEXTBOOK! and I'm counting it because it was work to finish it (and probably the only textbook I've read cover to cover). It's David Bird's Understanding Wine Technology (The Science of Wine Explained), 3rd edition. We read it for Wine 101 (intro to oenology) at the Wine Institute in South Seattle College.
Thorough, insightful, and totally understandable for the layman, this book is pretty much revered in the industry (winemakers not sommeliers). Excellent read if you want to know about the chemistry and microbiology of wine. Not very entertaining, though (haha).