Polished off Return of the Lazy Dungeon Master, which I finally read cover to cover, the other day. While much of it I had already picked up from the podcasts/YouTube videos, it's overall a very solid, actionable book of advice, especially for DMs who might sometimes find themselves overwhelmed by work. It obviously favors DMs more comfortable with improv (late in the book, Mike mentions that Matt Mercer preps for three hours for every one hour of game time, which is wild), but even for folks who want more stuff prepped than Mike, it's a very good book. Highly recommended.