he puts in tab for his instrumentals.
I just use the book as a song book, I dont use the same chords as he does for Lovely Joan,to me the tune is based round a d modal to c progression,which is different from what he suggests.
In my experience the best thing is to find an open tuning that works for you,and then work things out for yourself.
I do lovely Joan in double drop d.
When I play Scarborough Fair in standard.
I prefer to start in A minor.,and I use an inversion further up the fingerboard.