Some i have on kindle:
The new saltwater aquarium guide.
Saltwater aquarium success
Reefbums guide
The new reef aquarium
A few hard copies:
Reef aquarium a comprehensive guide........
Aquarium Corals...........
Plus a few others centred around breeding ornamentals and culturing plankton etc
There is much info contained that is a little outdated in many of the aforementioned books, much will already be familiar to you if you have previous exp.
I started with kindle as its cheaper and i could get to reading immediately instead of waiting for postage. Some are exxy even on kindle, some are not available, some are regarded as textbooks and are very expensive even on kindle, but all are an ok read, depending on your exp level may be a little oversimplified and not gritty enough, kind of depends on where you are heading and what your end goal happens to be.