These PDfS are simply too expensive.They are supposed to be collected into a book in the end, but when you use some basic maths, you realise that the price for all of them is as much as a nicely printed book (at current, and the book is not even done by far, as far as I know), which is simply a lot of money when it is not a phycial book. However, one of my players needed the mouse for the campaign I am running, so I bought this particular one (and sure, I like it a lot). Since I like it a lot, I am rating it at 3, due to the price. A good product, but a bit pricey.