So, as a change of pace from my usual bio/paleo mentions, I just finished reading a great astronomy book,
The Hunt for Planet X, and was about to recommend it. I started looking for the ebook pricing, and found myself in the depths of insanity of Lovecraftian proportions-- the only (legit) electronic version I can find costs $25--
per section. So a full copy of the book would cost you $250.
http://www.springerlink.com/content/978-0-387-77804-4
so if you want it you are stuck with the print copy
http://www.amazon.com/Hunt-Planet-Wo...dp/0387778047/
or getting it by other means (cough, cough).
It is a very nice historical book starting from the discovery of Uranus, going to the Brown/Oritz kerfuffle and the disemplanetizing of Pluto, and summing up with mention of a few future/current projects for finding outer solar system objects. It is really too bad that on the ebook front the publishers can't discover Theiranus with both hands and a flashlight.