Brian Reters said: "I suppose since no-one else seems to have brought out a diatonic accordion / melodeon tutor that goes beyond the Watson entry-level guide, I should think about it myself sometime. Hmmmm......"

Didn't Dave Mallinson write several books for it? Are they still available?

I used to play it (I had a couple, in different keys for song accompaniment) but it got to be a lot to carry around. Anglos are smaller :-)