Hi David,
Thanks for your message. I’m very happy to hear that you are enjoying the courses and finding the e-books useful.
Your suggestion of a melody book is great, and I would love to do that. The problem is with copyright issues around the tunes, which is not a problem with the chords alone, but when reproducing the melody this is an infringement of copyright (doesn’t apply to the tunes used in the Lead Guitar Fundamentals course).
My suggestion would be to attempt working out some melodies by ear via listening to the original recordings. Alternatively, there is a community compiled songbook (not subject to copyright infringement as it is for educational purposes only and has not been sold) floating around online called the Django Fakebook, featuring melodies to a number of tunes (in standard notation only).
I will however be beginning work on a new course in the near future, so you will certainly hear about that when it is released!
Wishing you all the best,
Harry