More reading
This one is essential book for a serious hobbyist:
Coral Reef Ecology (Ecological Studies, V. 102) by Yuri I. Sorokin
Paperback: 480 pages
Publisher: Springer (December 1995)
ISBN: 978-3540605324
Unfortunately this one seems to be very hard to find, even Amazon doesn’t have used copies available.
So if you are lucky enough to find one, buy it!