All of the Aqualog books are excellent value, although they are not particularly cheap. They are full to the brim with first class colour photographs and to reproduce these in book form is an expensive process. Whether they are about Dwarf Cichlids or some other species of fish they are the most comprehensive identification books you can buy. They never become dated because as new fish become available to the aquarist trade the books are updated. Either the book itself is updated or there are additional supplements that can be added.
The books are primarily for the specialist hobbyist rather than one who has a community tank in his or her living room. There is certainly nothing wrong with that scenario, but the Aqualog books are geared towards the hobbyist with a fish house who specialises in a particular species of fish. Having said all that I am sure anyone interested in tropical fish would love town and look at the Aqualog books and if they can afford them why not?