I learned piano for about 6 years which gave me a fairly good groundng in overall theory but as was pointed out, that doesnt really relate to the guitar. After piano I started teaching myself guitar, I only ever learnt one scale and made the rest of them up by ear without thinking about keys etc. I found the translation from piano to guitar too confusing on a practical basis because of the selection of notes onthe fretboard. I'm older than most of you guys too so going back to college is not an option (I already have two degrees!). I'm just looking for a book or online course that I can study at home at my own pace. Berkleemusic.com also offers online courses for 6 months in modern guitar theory - scales and their application (modes, intervals etc etc). That sounds good but as they point out on their site, everthing is thought by musical notation, not tab, so a book might be better to get the basic groundwork in. That book I mentioned is on the Berklee reading list and starts from scratch right through to advanced improvisation, so I presume it is top quality, just wondering if anyone has read it?