The Reef Aquarium Volume 1 by Charles Delbeek and Julian Sprung.

A great book, probably the best book on the subject at the time of release (1994). Perfect for any reef keeper, it covers many aspects of the hobby and though the information is a little dated, many of the concepts discussed within are still being practiced today, though with more advanced technology.
Also has lots of species guides and photos.

Has been read several times but is still in good condition.

Please see my other listings for more reef books.

Thanks