Contrary to the title, this is not a book about how to anchor. This is a book on how to select and size the gear required for anxiety-free anchoring. As such, it is a great resource. If you make it to a harbor of refuge ahead of the green clouds and the Sechezes are there, ask how much scope they have out. Then do what they tell you. Failing that, refer to this book.
Waterway Explorer Magazine 2013 Edition