Michael Willhoite is an American author and illustrator best known for his groundbreaking children's book "Daddy's Roommate," published in 1990. The book, which depicts a young boy's experience after his parents' divorce when his father moves in with his male partner, became one of the first children's books to portray a same-sex relationship. Despite facing controversy and frequent challenges in libraries, "Daddy's Roommate" has been recognized for its honest, age-appropriate approach to depicting diverse family structures. Willhoite's work helped pave the way for greater LGBTQ+ representation in children's literature.