Best books about Hydro grown marijauna ?

I've grown outdoors on and off for years but have decided to bring it indoors. I'm wanting to purchace a couple of books that this forums readers consider reference standards with regard to indoor hydro pot gardening. I have searched through the posts but haven't really found any consistancy in opinion on which books are best. Maybe if everyone with an opinion of their favorite chimes in a pattern will emerge. Please advise. Thanks TG

dont pay for books read ppls experiences in these forums, its free and every mistake that can be made has been made and there is tons of info on any issue and how to fix it.