I've already started well into my first book for the #PolymathReadingChallenge and really enjoy it: "Music - a subversive history" by Ted Gioia. I am 3 or 4 chapters in and find it meticulously researched and written in a very engaging way. https://www.hachettebookgroup.com/titles/ted-gioia/music/9781541644373/

However, I've also realized that it will be hard to read 600+ pages each month on this challenge alone, as I have other reading projects (for work, and current topics) and want to read some light fiction for fun.