Is there a definitive book on brewing sours. I'd just like to research and halfway know what I'm doing before I start.
Wild brews. Its a pretty decent book and covers the different bugs used for making sour beers as well as all the sour styles
Yep, that's kind of the go to book as far as I know. There is also a great BYO article out there by the same guy.
I hate Walder Frey...
Wild brews and check the website madfermentationist
Mad fermentationist was what got me into sours
theres a forum on the internet. homebrewtalk.com might help