I was not expecting to get as much as I did from this book, buying it just for the novelty. But there is so much material in this book, each room giving detail and source for new items to be brought into my Gamma game, and room by room an easy way to organize the info. Imagine a structure growing from the ground, encroaching on a location, but with such wonders for your post apoc group, except something is wrong, it keeps growing and there are dangers the original builders never thought would be a worry to the original owners, but as a post apoc group, the things inside are strange and deadly. Good tables too, new mutations, and interesting monsters.