What are some of the best book stores in San Diego?

I am going to be in San Diego for a few days and I would love to visit some used books stores. I am always looking for mid to late 19th century editions of the classics, Heritage press, Easton Press and early Franklin editions, Folio Society and of course LECs. I would appeiciate any suggestions you may be able to give. The list of books stores in the San Diego area is daunting and I would love to narrow it down some. Thanks.

Russ

My favorite bookstore in San Diego is Adams Avenue Book Store. There's a couple of smaller used book stores within walking distance of that store as well. Check out the reviews of it in Yelp and that has the address as well:
http://www.yelp.com/biz/adams-avenue-book-store-san-diego#query:used%20bookstore...

Thanks Rudel519! That was helpful.