Ironsworn is one of those games that I can't really stop thinking about. Whether the solo campaign I started playing (through Roll20, to keep my stuff organized), which I keep going back to; or the mechanics, which are so elegant and fairly simple to pick up; or the promise of the next upcoming expansion (which looks amazing). 

This book expands on the original and adds a lot of dungeon crawling to the world. Seriously, check it out!