Knowledge Is Power: The Last Reader

In a world where the ruling class has outlawed books and knowledge itself, Milo Peterson — blunt, sincere, and allergic to nonsense — has exactly one gift: Power of Knowledge, a rare Talent that lets him touch an original manuscript and summon the phantom of its author to teach him a skill instantly. It's powerful, and it's nearly useless, because he has no books, no combat training, and a body slowly turning to glass. — Description from novelcodex.org