Come to ACA 2008 for new and used cichlid books (multiple vendors + silent auctions + get your books signed by the authors). Its really the only place to actually see and touch a great selection of cichlid books before buying. I like the Dwarf cichlids:American Cichlids 1 by Staeck. For africans I like several books by Loiselle & Koenigs. I do like aqualog also. Shop @ fishbookstore.com if you can't come to ACA, but the vendor rooms are free to visit.
http://www.fishbookstore.com/product...e5b725e1718905
Most of my basic books are hopelessly out of date (and AWOL).