Wasn't able to find an epub version, but I did find a PDF version (bigger file size) and here it is:
https://anonfile.com/h6Ycs2i2bd/_Guitar_Method_Tom_Kolb_-_Music_Theory_for_Guitarists_Everything_You_Ever_Wanted_to_Know_But_Were_Afraid_to_Ask_2008_Hal_Leonard_pdf
Don't forget to :)!