(( I forgot to add at the end, Valarinth would probably be the best character to know anything about the book sence the book is of a language that was also around before anything was ritten down on anything but yeah again the only one that can read the book is Criss unless he gives consent, lets say the only ways that another can read the is Criss gives consent, A child comes into play or Because the way the book allows Criss to open the book, if someone some how got a hold of his blood in there blood vanes they would be able to touch and open the book without receiving the defense of the book but even then it would take a lot of Criss's blood and it would only work for a short amount of time, no where near enought time the learn anything good. as for the 20 levels of pain I kind of have to make them up as I go but  from levels 1 to 5 its pressure sensation, 6 you already know and from 7 to 9 are pain sensations from a small knife going thu what ever lim to haveing your fingers pulled off then from 11 to 16 the pain sensation are mixed with pain of unbearable heat and cold all going soul deep such as the pain feeling like if your intire arm smashed with a very hot 20 lb. metal hammer all the way to feeling as if first your hand/paw is smashed by the large hot hammer then it being ripped off then the same done to your forarm and then your upperarm, levels from 17 to 20 is pain sensations that are more or less redundant because theres not really anyone that can handle 17 without dieng horribly haveing a body or not and if by any chance they do live theres the 18th level the by any chance and there strong enough and they live past level 18 theres level 19, theres been only one that has lived long enought to know what 19 feels like and they didn't live to know what level 20 feels like and theres only been one that skills in sensation to be able to dish out level 20 and it is the one that made the book. Criss only knows levels from 1 to 18. ))