My mother in law was browsing the shelves of a used book store
and came across the book "The Carnivorous Plants" by Francis Ernest Lloyd.
It is a reprint of the original from 1942.
This is the first I've heard of this book. It is actually quite
comprehensive on all the CP groups. It even has a section on carnivorous
fungus
It has very detailed information on each plant including sections
in the pitcher plant chapters on the make up of the liquid in the traps.
It does not have any cultivation info (from what I've read so far, anyway)
but it is great for detailed analysis of each CP group.
Chris