I wish, I wish, I wish.... there was an updated edition of this book - one that didn't end 20 years ago, when the ISS was just still in the planning stage (couldn't help but smile as I read about a proposed Japanese laboratory, which is now a reality of course).
I found Collins's style of writing extremely readable - he has the knack of including technical detail without being either confusing or patronising. I squeed with delight at the sight of equations, and reference to derivatives! Woohoo!!! Mathematics!!!! And I finally understand the where and why of Challenger's O-rings. The way he writes feels very direct, like listening to him talk about things he obviously feels passionately about.
I guess I don't need to add that I enjoyed this book very much.