Which book should i buy for LOA?

Which book should i buy for loa. I want A book that will fully explain the law in simple ways. And i don't want it to do with religion too much. Now from those i don't know which is the best of the best, the king which i should get(you can recommend others): Think and grow rich Power of your subconscious mind The secret Any of Bob Proctors books Any of Neville Goddard book The master key system The science of getting rich Others.