Book Eater is a Manga/Manhwa/Manhua in english language, Manhwa series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

A student at the magician's academy with little talent, but all the knowledge one would expect of a scholar. He soon gains the power to obtain skills from books directly. He is the book eater.