The store was actually the main floor of a 1930s or 1940s era house, stuffed with 8 foot high shelves spaced too closely together to be able to stand far enough back to read the titles on the top shelf or two. Despite not finding The Screwtape Letters, she did find one of the Findley books she was after. I, on the other hand, after not finding any Douglas Coupland came out with Cat's Cradle, and a non-fiction book by Isaac Asimov, who I've only ever read a short story of for a project back in highschool english.
A couple more stops, without finding good condition copies of the Findley books she was after, or any condition copy of The Screwtape letters, and myself not finding anything by a rather limited list of authors I was after (more or less George Orwell, Chuck Palahniuk or Douglas Coupland) we finally headed home to check out Amazon.ca.
A quick google found one more store in town we had missed, right by the universities. It turned out to be the smallest of any of the 5 stores we ended up at, and really the most bland. But despite its lack of musty bookstore character, it had the best, and cheapest selection.
The moral of this long-winded story? University students will sell off their good books to the store closest to them for beer/rent/tuition money, leaving the stuffy, musty stores to jack up their prices on books with mosquitoes squished in the inside cover.