Beginners books for pure diatonic - NO 1/2 frets

Folks,

I haven't looked at beginners books for the dulcimer in many years. Does anyone have any suggestions for instruction books which do NOT use 1/2 frets. I'm purchasing an instrument for a gift and it's pure diatonic. Though I can provide some "lessons," I'd like to include at least one book. I believe Jean Ritchie's is for diatonic; please correct me if I'm wrong. Are there any others which any of you could recommend to me.

Thanks

Robert