Are you opening a startup? Are you thinking about joining a startup as an executive (CTO, VP of Engineering?)? Then, you must read this book before you even quit your job!!!
Josh Petersen from Robot Co-op (43 Things) recommended it to me before I left Microsoft. I read it cover-to-cover and I was in awe at how much I didn't know about business law.
The cool thing about this book is that I could understand everything. It starts with what you can and what you can't do before you leave your current employer, to how to choose a law firm, how to establish a stock option plan, how to create a fair cap-table, how to protect your IP, how to raise funds, sell the company, etc.
It has two other good things: Real case studies, mostly of company that screwed up; and a fictional-case that they start in chapter 1 and go all the way to the end.
I love this book and I strongly recommend to any Entrepreneur or anyone working on a small startup.