Bookshop detours

The places I duck into when I'm supposed to be on my way somewhere else, usually with a coffee already going cold in my bag. These are the Boston-and-around shops that have earned a permanent spot on my phone's maps — some for the stock, some for the smell, one almost entirely for a cat I am not going to name because then it gets complicated. Fair warning: I changed my mind about at least one of these on a second visit, and I'm not telling you which.