From Muppet Wiki

Sesame Street books featuring Herry Monster.

Cookie Monster's Circle Book 1972	Sherlock Hemlock and the Great Twiddlebug Mystery 1972	I am a Monster 1976	A Baby Sister for Herry 1984
My Doll is Lost! 1984	A Sitter for Baby Monster 1987	It's No Fun to Be Sick! 1989	I Want to Go to School Too 1990
Scheherryzade and the Arabian Nights 1991	Too Little! 1992	I Want to Be a Police Officer 1994