A Buyer's and User's Guide to Astronomical Telescopes & Binoculars (The Patrick Moore Practical Astronomy Series)
From the reviews:"Purchasing your first pair of binoculars or first telescope can be an intimidating task. … James Mullaney’s book is an invaluable guide to aid in your purchase. … He has compiled comprehensive, up-to-date product and contact information for manufacturers and suppliers of binoculars and telescopes. … While it’s certainly a great book for the novice observer, advanced amateurs will probably find that the book covers too much familiar ground to warrant purchasing." (Jennifer Birriel, Sky & Telescope, November, 2007)