CAVEAT NON EMPTOR: You might want to read the book first.
Peoria South Public Library
Not technically a bookshop, but definitely one of the easiest places to steal Kleptomania For Dumbbells in the state of Illinois. Read about the low-silled window trick in Chapter 7 of the same while seating discreetly on a bench by the southeast wall.
DAVE’S HONOR SYSTEM BOOKMOBILE
The name says it all. DON’T put cash in the little box for your next purchase, or else if you don’t like the puerile thrill of shoplifting a book about shoplifting then do.
TOBY’S BASEMENT VIA THE WEST CELLAR DOOR
Again not technically a shop, but we are not sure that Toby still has Kleptomania For Dumbbells but he definitely stashes the books he steals from Dave’s Bookmobile in his basement, and the cell door padlock is an amateur affair. Don’t forget to bring a paperclip and a flashlight!