Cloud computing. It's the newest thing, but it's also quite confusing if you're just getting started. No longer can you just buy a simple hosting plan, upload some code and have it run. Now you have to deal with their command line programs, push your code using Git, and navigate a dizzying array of configuration and addon options. The Heroku Hacker's Guide by Randall Degges is your guide to orienting yourself in the Heroku world. It's not a reference, it doesn't hold your hand on irrelevant details, it just shows you how to use Heroku, plain and simple.