As usual  Bing  keeps things  pretty  simple.
I have  other books by BING
Learned  alot about the fretboard, pickup  amplifiers and  more.
I also had to  get  a L R Braggs  acoustic D.I. because I  didn't have a preamp in my dulcimer I  just had a  standard  pickup. 
I enjoy the  exercises  in the books 
Over  all it is a very good  book very educational. 
I highly recommend this book to anyone who is looking forward are  to playing  the bass dulcimer.