This is a list of all recommended characters that are different verisons of Book.
Emerald Book appeared in BFB 2. They are a book made out of emerald.
Evil Book is a recommended character in Insectophobe's Nightmare 3. She was recommended by Redking632. She placed 12th out of the Top 25 recommended characters. Unlike Book and the other evil variations, her cover colors are both purple and red. Her friend is possibly Book, the character she was based off.