I don't actually own all of these books, but these are the ones I find most
useful in identifying and collecting my shells...
-Compendium of Seashells
-Abbott's Seashells of N.A.
-American Seashells
-Keen's Shells of Tropica West America
-Audobon guide (for great habitat info)
-Abbott's Collectible Florida Shells (for "packability")
-Seashells of the Phillipines
-and for landsnails, Compendium of Landshells

Patrick