@pixelpaperyarn I wrote one - am a uni prof by job and my paper book is expensive, and so when I wrote the second one, I chose to do it as an ebook with the hope that people would actually read it (I could make it cheap if I controlled it). -and that one's not academic in the same way. I'm beginning to think it is a completely separate audience. although I don't have a clue how to market/promote & think for sure I'm missing a trick in that, but I didn't learn it training as a cello player... :)