studmissile wrote: Don't know those (sure they good fine) the the best I found for a base and foundation is Fretboard Theory by Desi Serna. http://www.amazon.com/Fretboard-Theory-ebook/dp/B004ASNACS/ref=sr_1_3?ie=UTF8&qid=1375298466&sr=8-3&keywords=Desi+Serna