Interesting and informative. Even though I have not done my Advanced Open Water course (I found this book at a garage sale), as an Open Water Diver, I have often (almost always) dived off a boat, and I've also done drift diving. The Underwater Naturalist and Wreck Diver chapters were also very useful, and all the other chapters were interesting as well.
Assigned reading for my PADI SCUBA diving course. I think it's a good overview of the skills I'll need - it had lots of illustrations, self-tests and was reasonably interesting to read. After reading it (and watching the accompanying PADI video) I passed the knowledge exam with 95%. If I drown, I'll let you know in a follow-up rating....