Comic Rocket is a growing index of 36,641 online comics. We link to creators' sites exactly as they're meant to be shown. Dive through the archives or read the latest page, and Comic Rocket will keep track of where you left off.
From TV Tropes:
“Between Failures is a slice-of-life webcomic following the (somewhat under-motivated and decidedly sarcastic) staff of a chain bookstore. The primary protagonist is Thomas Blackwell, but it cuts to follow many members of the staff. It’s often compared to clerks, though up to the second volume only 2 customers have actually been shown.” (It’s actually a lot more like Empire Records, which the author totally suggests you see.) “The main focus are the characters and the shenanigans they come up with to keep themselves entertained.”