We are all different, so the books that will be "perfect" for one are not necessarily so for all. We also go through different seasons in our own lives, during which some books are helpful while others, good in themselves, are harmful. ANY good book is a tool meant to be used by God for edification, instruction and consolation. Not ALL books do such for all of us all of the time. Holy Writ is an obvious exception, although not ALL the books contained therein are good to be read by ALL people at ALL times. God's will is what gives ANYTHING power and efficacy - a book, His own or others, any other created thing, etc. God speed in JMJ