These skinny books of 35 or so pages. Somewhere around 20 of them in the series. To me these books felt like a killer day at GIT. And it was. I have from the original series; Fusion Don Mock Hot Licks Don Mock Melodic Chord Phrases Ron Eschete Jazz Jackie King Chord Connection Dave Eastlee Artful Arpeggios Don Mock Rock Keith Wyatt Jazz Rock Steve Freeman Rock Rhyrhm Terence Elliott Blues Robben Ford Fingerstyle Blues David Ferguson Then I have the very earliest and rare; Chord Scale Relationships Kato Solo Chords Roger Hutchinson Modes Roger Hutchinson Don Mock Triadic Energy Lenny Carlson And I have more early stuff that isn't in its place. Plus I have lots of later publications by Ford and others. I can easily say that my REH collection is the biggest series of books that I have. They were a unique concept in books back then, imo they wrote the book on how later books would present their layout. What books do you have?