The following are the books I actually have. All are Exercise books except for the Borg Charles Books which are progressive (I only have the intro book and vol 1) and primarily consist of written tunes/songs and bass parts. His books are fairly inexpensive (under 20.00 US each) and can be ordered directly from him. His email is listed under his books. For scales Ellegaards book (in my own opinion) is by far the best, dont let its simplicity fool you. I also like to learn the chord forms and play them in block form on the free bass. You can use any fake book for progressions and play the melody on the right hand.
Free Bass Books:
Accordion Manual for the Chromatic Free Bassetti System Book 1
Rudy Molinaro
Neofonic Music and Recording Company, NY
How to Play the Free Bassetti System Accordion
Flaviano Fogli and Frank Gaviani
Ernest Deffner Publications
http://www.ernestdeffner.com
Comprehensive Method for the Chromatic Free Bass System
Mogens Ellegaard
M. Hohner Company
First Steps on the Bassetti Accordion
Borgstrom/CharlesWaterloo Music Co. LTD,
Canada
Boris Borgstrom <EMAIL email=
bborgstrom@cogeco.ca>
bborgstrom@cogeco.ca</EMAIL>
Progressive Method for Chromatic Free Bass Accordion Vol 1 (3 or 4 volumes available)
Borgstrom/CharlesWaterloo Music Co. LTD,
Canada
Boris Borgstrom <EMAIL email=
bborgstrom@cogeco.ca>
bborgstrom@cogeco.ca</EMAIL>