He gave it the short title:
"Joel on Software: And on Diverse and Occasionally Related Matters That Will Prove of Interest to Software Developers, Designers, and Managers, and to Those Who, Whether by Good Fortune or Ill Luck, Work with Them in Some Capacity"
Besides that humongous title, Joel knows how to keep it short and simple.
You can find most of the material online at "Joel on Software", but Joel Spolsky has one striking argument why to buy this book:
"... the biggest advantage of the book is that when you throw it at your colleague's head after a very frustrating argument about whether to throw away all your code and start over from scratch, it makes more of an impact than a URL. So buy several copies and keep them handy for winning arguments at work. "