In late 2019, I began the work of creating a world for a D&D5e campaign. When the pandemic hit, I ended up with more time to devote to this project than I had initially imagined. However, the thought of laying out all the dungeons I would need, just for the first phase of the adventure, was daunting. But then I stumbled across this book. It proved to be one of the best purchases I made during that world-building phase. Justin's maps are well-designed and engaging, leaving plenty of room for your own imagination to populate them with all kinds of mystery and awfulness. I highly recommend this book to all DMs!