I have got quite a collection...mostly devoted to DSO's. Here is the incomplete list (can't remember what I have off the top of my head
Touring the Universe through binoculars-Harrington
Star Ware 2 and 3-Harrington
Star Watch-Harrington
Deep Sky Companions: The Messier Obects-O'Meara
Deep Sky Companions: The Caldwell Objects-O'Meara
Deep Sky Observer's Guide-Bone
Deep Sky Wonders-Houston
Cambridge Deep Sky Album-Newton
Practical Skywatching-Levy and O'Bryne
Skywatching-Levy
Collins Gem "Night Sky"-Ridpath/Tirion
Some which I had but sold:
Stargazing With A Telescope-Scagell
Hands on Astronomy A Cambridge Guide to equipment and accessories
City Astronomy-Scagell
The Australian Guide to Skywatching-Thompson
Darren