Bio Gas Book Suggestions??

Greetings to All! I am a book worm. Like to have a book on my shelf as a resource for any project I have done or am doing. I've asked for Book recommendations before in the past and all of you folks on Pemies.com have been very helpful. So here is another book suggestion I'd like to have, a good book on biogas! Any one used one, built by one? Love to hear your suggestions!!

I got The Biogas Handbook by David House, and it's the best I've seen so far, really almost the only book I've seen so far. It's got a lot of technical info in it, a lot of references to the (scanty) research that has been done so far. Seems exhaustive.

We made a biogas digester, but in our climate we need to solar heat it, and ran into some problems, so after the first round of gas in the kitchen, it's been non-functioning for over a year. It will work, eventually, but we've got a zillion projects going on.

Rebecca, The Biogas Handbook by David House keeps coming up as the authoritative work at the moment. I was hoping to maybe see if someone would come out with something else before I put the money down. But so far his looks like the best bang for the buck!! Thanks for the suggestion. Hope you get your system up and running soon!!

Are there any new biogas books or links that have been mentioned since this original post?
Sincerely grateful for any input on building a home scale biogas digester to replace propane for heating and cooking. Is biogas a viable alternative to clothes drying?Will a standard gas dryer operate on biogas? How about a gas water heater?
Again any information is greatly appreciated.