Colleen’s of Medford Square is hosting a book signing event with Amy Moy, author of “The Polka-Dotted Penguin” and “Dottie Meets Mully the Bully.” Moy is an optometrist, teacher, lecturer, wife, and the mother of an extraordinary girl who happens to have Down Syndrome. She writes about anything that strikes her as needed in the world. Her debut as an author was “The Polka-Dotted Penguin” because she wanted more options of books to read to children about inclusion and celebrating differences.