Unless Nick Dakin has taken the time to rewrite for a new edition, his rext for reef aquaria is a bit dated. Even though John Tulloch's book is excellent and deals with biotopes as opposed to mixed speciation, even some of the information in his book is becoming dated as new information regarding DSB and nitrate reduction is becoming available. Overall, both are great books for initial reading to gain husbandry skills. I might mention
Bob Fenner's
The Conscientious Marine Aquarist --A Commonsense Handbook for Successful Saltwater Hobbyists as another good book that has a great deal of information applicable to reef keeping.
Somewhere here there is a thread of 10 books that I recommended for the local library to purchase, might want to search back about a year or two ago for the thread. Maybe Cath knows where it is.
HTH