"3 books in 1"--Front cover. "3 books in 1!"--Front cover "3 books in 1" -- cover. "3 books in 1!" -- Cover. "3 books in 1" -- cover 2 books in 1! -- cover "3 books in 1"--Cover "Usborne STEM"--Front cover. "2 books in 1!"--Cover. "3 books in 1!"--Cover