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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.”