I found "The Bee-friendly Beekeeper A sustainable approach" by David Heaf to be an excellent introduction to the philosophy and practice of top bar beekeeping. Its all you need to do it.
It even has plans for the Warre hive. I got it on line, I think from ABE. It is about top bar beekeeping, mainly Warre, but also Kenyan and other types too. David Heaf is British and the book is published in the UK by Northern Bee books. Cheers