Creative lot that we are, we seem to be coming up with words and terms of phrase for various items that affect reading, swapping and buying books. Here's a few I can think of - please feel free to post with any I have missed.
Swaplifting - not fulfilling a commitment to swap and therefore stealing a book from another member
D1ck Lit - easy read macho books (Chris Ryan, Andy McNab etc - as opposed to Chick Lit)
Private D1ck Lit - private detective stories, usually easy reading
Thick Book Tax (TBT) - Royal Mail's Packet Rate
Double Parking - when you have so many books on your shelves they are now stored in two rows on one shelf
Double Booking - when you manage somehow to acquire two copies of the same book