that is one of the best books out there, it covers alot and is easy to understand

The New Marine Aquarium by Michael S. Paleta is also a good book to start with

The book Marine Fishes by Scott W. Michael is good when you are looking into what fish to get, there is also a book out there called What Fish and it is along the same lines as Marine Fishes only it is cheaper and a little easyer to read, it has less fish listed but the ones you will find in most pet stores are in there and it is worded a bit better