Are there any books or materials available that focus solely on fretless instruction? Or, is it a matter of just playing the instrument and applying the same theory that is used for fretted instruments? I love my fretless bass and I feel that it was one of the best decisions that I have made regarding any of the items that I have purchased. My level of comfort is not there yet on the instrument but to be honest with you, I still have a long way to go on fretted basses. I usually try my best to perform the same exercises on the fretless as I would on the fretted basses. I do find that I have to listen and focus more on my technique on the toothless. Any suggestions? Is the answer just to keep playing? Thanks!