Atlas of the Moon: Revised, Updated Edition	Unfortunately, the gold standard of Moon atlases is out of print. I borrow it from my library when needed.
	Burnham's Celestial Handbook: An Observer's Guide to the Universe Beyond the Solar System, Vol. 1	The handbook was compiled single-handedly by Burnham while on staff at the Lowell Observatory, Flagstaff, Arizona.
	Burnham's Celestial Handbook: An Observer's Guide to the Universe Beyond the Solar System, Vol. 2	Even though it has become somewhat dated since it was last published in 1978, it is still sought out by amateur astronomers interested in deep-sky objects.
	Burnham's Celestial Handbook: An Observer's Guide to the Universe Beyond the Solar System, Vol. 3