Book Thief Saint

Book boxes can escape, words can kill, and I am the only one who can capture them. In the "Elgar Library" suspended in the clouds, the collection of books is called "living creatures" - they will turn into birds and beasts to escape from the bookshelf, and even tamper with their own contents. Shirakawa Yu, a young man who lost his memory after touching a forbidden book, was forced to become a hunter to hunt down "escaped books". Until one day, he came across a disappearing "Book of Prophecy of Human Destruction", and what appeared on the page was his own handwriting... Do you want to find the words or yourself?