Marvin Post is the owner of Attic Books in London, Ontario - one of the largest, most successful used/antiquarian bookstores in Canada. 

I met with Marvin to discuss the reasons behind his success. Among other things we talk about buying lots of books, religious books, double downsizing, millennial debt-load, fresh stock, on-line versus in-store stock, buying buildings, skulls on shirts, shows, areas to collect in, medical books, books as investments, books into movies, fake signatures, storage units, and enjoying your life. Marvin also provides commentary on a selection of used books that I brought into the store for trade. 

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