I believe the Endemic Cichlids of Madagascar should be in any serious Madagascan cichlid keepers library.
Photographs of fish and natural habitat are beautiful, but more importantly, it is also full of the information many coffee table/photography books lack.
Though names of cichlids may be constantly evolving, and/or changing, this does not alter the important detailed information about location, housing requirements, or habitat insight the authors have provided, and deemed from their own travels throughout Madagascar, and first hand experience keeping these challenging fish.
I have the same opinion of books like Weidners Eartheaters, or Konnings Central American Cichlids.
Where the names, or evolutionary theories may have seem a bit retro, because of DNA or other modern technological breakthroughs, the meat of the books transcend the superficial, at least to me.