A superhero named Bookman with a unique design where the back of his head is a book that can open, wearing a sleek, full-body suit with a transformation belt around his waist. The suit is detailed with subtle patterns resembling the texture of book pages, and his pose exudes strength and intelligence. The opened book on the back of his head reveals glowing, mystical pages. The overall aesthetic is a blend of modern superhero design with a touch of fantasy and literary elements --niji 6