Title (in a yellow star): "Offers at our Bookshop"

Panel 1: Buy two, get one free
A figure approaches the till with three books

Panel 2: Buy four, get a free tote bag
The cashier holds up a tote.

Panel 3: Buy one, get talking to staff, leave with five
Customer leaved happily, carrying a full tote and waving to tthe wo staff

Panel 4: Buy none, get a guilty feeling
Customer skulks out of the shop

Panel 5: Buy three as gifts, get the urge to keep them
Customer walking home already reading the books

Panel 6. Get overexcited, buy twelve...Get home, get eye-roll from partner
Customer arrives home reading a book and carrying two full totes.

Tom Gauld | The Guardian