The information is undeniably great but the author has substituted many letters and sets of letters with antiquidated characters and foreign letters, making it a pain to read and uninentionally comical; the effect of many of the substitutions is to mentally create a lisp, turning this into Demonology by Daffy Duck. Still worth the purchase for a GM who's interested in demonology and could use a point of reference, albiet one that costs more than money to use