Wow. This.is.the.book. If you want to understand space travel, the history, the physics, the economics... just about anything - this book has an incredible wealth of detail. Orbital mechnics, rocket science, the details of Shuttle servicing and more - this book is really excellent.
It helped me in thinking about the design and development of my JoyRide project. Lee is an excellent educator, and carefully makes sure not to intimidate - no hard math, no equations, yes still provides an enormous amount of details and facts in an accessible and fun format.