Opening Doors is a useful introduction to squatting. Whereas other zines on the topic are clearly dated, Opening Doors was written after the “housing crisis” and comes out of the context of increased foreclosures and empty houses. It discusses how to form a group, how to find a building, how to secure a building, moving in, and provides basic legal information (although it can be a little Portland-specific as that is where the authors come from). Overall, it’s a useful zine if you are interested in squatting or learning more about it.