。
Books are now within anyone's reach.
Literal
Books [topic-は] currently anyone's [possessive-の] hand-[to-にも] enter.
誰の手にも入る ('enters anyone's hand') is a variant of the more common 手に入る idiom: 誰の ('anyone's,' possessive) + 手 ('hand') + に (target) + も (universalizer) + 入る ('enter'). The sense is the same as the standard 手に入る but with 手 bound to a possessor. 現在 ('currently, at present') is a more formal word for 今.