the best book ever is holly quaran
Allah Said
" This is the Book about which there is no doubt, a guidance for those conscious of Allah " -
" Who believe in the unseen, establish prayer, and spend out of what We have provided for them, "
" And who believe in what has been revealed to you, [O Muhammad], and what was revealed before you, and of the Hereafter they are certain [in faith]. "
" Those are upon [right] guidance from their Lord, and it is those who are the successful. "
check this link