You probably won’t discover an 1862 letter from Mary Todd Lincoln at this weekend’s Antiquarian Book & Paper Fair in Akron: Unlike the one to a Cleveland businessman that recently sold for a cool $46K, most of the letters, books, postcards, maps, prints, theater programs, and other ephemera is likely to be somewhat less expensive. But that doesn’t mean its not of value: Organizers expect more than 800 collectors and assorted curious types to cram into the John S. Knight Center to check out the goods from 40 or so dealers. This year’s fair marks the 30th annual event for NOBS — the Northern Ohio Bibliophilic Society. Executive coordinator Brian Meggitt says the group was established in 1983 to advance members’ interest in books “both for their content and their cultural significance.” Admission at the door is $5 for adults, $3 for students, and zip for NOBS members. Today’s hours are 3 to 8 p.m.; Saturday’s hours are 10 a.m. to 4 p.m. and include free workshops on collecting at 11 a.m. and 1 p.m. Check out the website for details.