Free information is good. Free, quality information is better. But this is a ton of free, quality information that is nearly impossible to find or get. So if you're interested in brewing anything in the Lambic stye, you need this download:
The download contains the PDF of this book which is $100 used, $500 new:
Lambic (Classic Beer Style) by Jean Guinard
And it contains the full 3-part series of Brewing in Styles: Practical Strategies for Brewing Lambic at Home by Jim Liddil. Which can only be found in the non-gettable back issues of the now-defunct magazine "Brewing Techniques"
And it also has this paper from the University of Colorado: Microbes Found in Lambic Wort by Mick Burgeson
All the PDFs are meticulously hand-scanned versions of the original texts.