Once upon a time I remember an inexpensive handy little field guide to
North American Seashells (by Dance and Abbott I think) that was spiral
bound and had pretty good pictures of many common North American
Shells.  I didn't buy it and now wish I had.  Does anyone know whether
it is still in print?  I have been unable to get it even though it is
still listed on some booksellers lists.  Haven't seen any come up on
bibliofind lately either.
Other than that, is there another book that could be recommended as a
Field Guide for North American Shells (rather than as a heavy tome).
I'm thinking of something I could slip into a day pack.