I thank you all for the answers too. More?
Books I have in english
*****Baensch Aquarium atlas 1-3: Best books I've seen.
****Dr. Axelrod's Mini-Atlas of Freshwater Aquarium Fishes: this is mainly a picture book but quite good of that kind.
****Mini encyclopedia Aquarium Plants: I like this book. Not very extencive but good anyway.
****Back to nature: Catfishes: Nice, good pics and ok amount of species. No L-numbers used is a big minus.
****Back to nature: Malawi cichlids: Good I think, I don't care that much of malawi cichlids. Good pics.
****Back to nature: Tanganika cichlids: Same as with malawis.
***Aquarium fishes of the world (Axelrod, Burgess, Warren etc.): Pictures are nice but I don't like that fish species are in the alphabetical order.
***Aqualog: Shrimps, crayfishes and crabs in the freshwater aquarium: Too light and doesn't introduce enough species but ok. Nice pics.
***Britman, Rasboras: Bit old book and quite shallow but ok and shows some rare species too.
***Lucanus, Gouramis and Other Labyrinth Fishes: Ok, but could be much more extencive.
*Sterling, The practical aquarium fish handbook: Information is ok, but I've never seen worse pictures.
*Tropical fish, a Golden quide: Bad information and I don't like drawings.