The Advancing Guitarist, by Mick Goodrick
The Advancing Guitarist is a guitar-focused applied music-theory book by jazz guitarist Mick Goodrick. The book proposes that the first stringed instrument may have been a single-string "unitar", and that perhaps we should seek to understand how the first unitarists played their instruments to inform our own modern guitar playing!
The author, Mick Goodrick, is a renowned veteran jazz guitarist.
The Advancing Guitarist encourages aspiring guitarists to take measure of the fretboard and account for all its possibilities, including scales, modes, triads, intervals, chords and more. The book also suggests some vamps to aid in your improvisation. A few of these vamps are available on YouTube, if you care to search them out. The following is an example of the F Lydian vamp from the book: