Listmania!
My Humble Astonomy Library
By an Amazon.com customer
Turn Left at Orion: A Hundred Night Sky Objects to See in a Small Telescope--and How to Find ThemTurn Left at Orion: A Hundred Night Sky Objects to See in a Small Telescope--and How to Find Them by Guy Consolmagno
Buy new: $18.47 / Used from: $16.48
Even if you have a computer controlled 'scope, this is a great beginning guid to the most prominent night sky objects grouped by season.
The Backyard Astronomer's GuideThe Backyard Astronomer's Guide by Terence Dickinson
Buy new: $34.19 / Used from: $4.93
All-around reference for amateur astronomy.
Astronomy HacksAstronomy Hacks by Robert Bruce Thompson
Buy new: $16.47 / Used from: $11.95
The title says it all.
NightWatch: A Practical Guide to Viewing the UniverseNightWatch: A Practical Guide to Viewing the Universe by Terence Dickinson
Buy new: $23.10 / Used from: $14.89
Sky & Telescope's Pocket Sky AtlasSky & Telescope's Pocket Sky Atlas by Roger W. Sinnott
Buy new: $13.57 / Used from: $11.84
Small portable atlas.
Sky Atlas 2000.0, 2nd Deluxe Edition by Wil Tirion (Author), Roger W. Sinnott (Author)Sky Atlas 2000.0, 2nd Deluxe Edition by Wil Tirion (Author), Roger W. Sinnott (Author)
Buy new: $39.95
A not so portable atlas with tons of detail.
The Night Sky 40°-50° (Large) Star FinderThe Night Sky 40°-50° (Large) Star Finder by David S. Chandler
Buy new: $11.95 / Used from: $21.03
Nice planisphere, just make sure you get the correct one for your latitude.