Just finished reading the Astronomy Hacks book from O'Reilly books. It's part of the "Hacks" series of books from O'Reilly. Astronomy Hacks is basically compilation of tips and advice for astronomers. While there is a definite bias towards dobsonian reflectors, authors Robert and Barbara Thompson do a great job of showing how to get the most out of any piece of astronomy equipment. They also give a great list of open source software for astronomy. One of their suggestions, Cartes du Ciel, has become a favorite star charting program of mine.
Recommended!
