Depending on your location in the United States (or World) this may be of interest to you.
I've recently become aquatinted with a bookstore in Fullerton California that has some fantastic finds. Old magic books, new magic books, rare, unusual, first editions, and then some!
Called "Aladdin's Books" it's located in downtown Fullerton. (In case you don't know where that is, it's about 15 minutes away from Disneyland)
The shop isn't just magic, it has many second-hand books about movies, television, and other miscellaneous topics. I saw books about screenplays, and books about the 1964-65 NY World's Fair.
Going back to the topic you all may be interested in...
There was a very long row of shelves devoted to magic books. A generous stock were older books. While a smaller area had rather new books. (Some of these "newer" books are even marked down in price)
I was planning on spending less than an hour there.. and found myself there for 2 and a half!
There is also an area of the store filled with lecture notes and booklets. I found lecture notes dating to the 40s (yes, yes, I know it isn't that old)
If you can get to this shop, it's a great place. You might just find some good bargains.
Any other places like this in S. California?
Former Vonnegut Character