Good copies of common titles.  May include some clean ex-library editions, book club editions, or paperbacks. This is the most popular club level for small children (who could care less about first editions) and fiction readers (who just want a good paperback to read in bed). 

Reader's Club Examples
for your toddler Sendak enthusiast: 
an early but certainly used copy of In the Night Kitchen
for your juvenile fantasy afficianado: 
a new paperback of Phillip Pullman's The Golden Compass
for your mystery buff mother-in-law: 
a book club edition of Agatha Christie's  A Caribbean Mystery
for your sister the feminist artist: 
an ex-library copy of Originals: American Women Artists

Classics and well-loved favorites, as well as new discoveries and overlooked gems. Most books are in great shape, but occasionally a very clean ex-library copy or one lacking a dust jacket allows those more obscure and popular titles (and particularly Caldecott and Newbery winners) to be included in this club. This level is perfect for gift-giving and for the discriminating reader. 

Bookworm Society Examples
for your toddler Sendak enthusiast: 
a nice vintage copy of Where the Wild Things Are 
for your juvenile fantasy afficianado: 
a new boxed paperback set of Edward Eager's Tales of Magic
for your mystery buff mother-in-law: 
a nice hardback edition of Martha Grimes' The Old Silent
for your sister the feminist artist: 
an out-of-print copy of Judy Chicago's Holocaust Project

Nice editions of award winners and perennial favorites in clean, bright copies. Out-of-print classics, illustrated editions and fine copies with dustjackets are the norm in this club. For young readers, this means Newbery and Caldecott Award winners and other interesting and well known titles. For grown readers, this means fine hardback editions and illustrated volumes such as gardening and travel. 

Book Lover's Guild Examples
for your toddler Sendak enthusiast: 
a beautiful first edition of Outside Over There
for your juvenile fantasy afficianado: 
a first edition of Madeleine L'Engle's Camilla
for your mystery buff mother-in-law: 
a first edition of Ray Bradbury's Death is a Lonely Business
for your sister the feminist artist: 
an exhibition catalog of Pandora: Women in Classical Greece