One of the most fun and comprehensive books I've read recently is Guy Kawasaki's classic The Art of the Start.
It was a really fun read and covered all the basics of entrepreneurship I had learned about before but gave them a very succinct, clear structure. It also went through pretty much all the important questions an entrepreneur needs to consider, and I can see how it can serve as a helpful guidebook for preparing business plans, pitches, and actually starting a company.
The book starts with a general introduction speaking about economic cycles. It does this through two metaphors: telescopes and microscopes. When things are going great, everyone looks very far into the future (with an all-seeing telescope) and has high hopes. When things aren't going so great, everyone looks very closely at every minute detail and cost (with a microscope). Entrepreneurs need to be able to do both in appropriate measure.
Ch. 1: Starting
Ch. 2: Positioning