The book is very good, However, the Kindle app version for PC's and Tablets is useless for me. I bought it for my Microsoft Surface so that I could set the Surface on a music stand and play the songs. (The book, which I own, is unwieldy, so I have had to copy pages and use the sheets.) When I used the Kindle app on my Surface, the default size of the page (even with the largest font option) was unreadable from more than a foot or so from the screen. The zoom option under the view tab is grayed out. I have been told by support that there is no solution for this. I requested a refund for the Kindle version of the book.