"It's titled, "Book of Curses""
"There's a key embedded on the back cover. Will you remove it? Yes/No"
Book of Curses (呪いの書 noroi no sho ) is a key item which can be found in the the Resident Evil remake. In the GameCube and Wii versions of the game, the name is instead "Book of Curse".
The Book of Curses is found on an indentation in the underground crypt behind the entrance hall.