What is the fine-grained topic of the following text: In addition to working on various Muppet television, movie, and other projects, Lewis is cowriter of the Andy & Sandy series with Tomie dePaola; has “ghosted” books for Kermit the Frog (Look Before You Leap), Miss Piggy (The Diva Code), and Pepe the King Prawn (It’s Hard Out Here For a Shrimp); and served as executive producer of the Hallmark Channel series Telling Stories with Tomie dePaola. Only return the topic.
Lewis' contributions to Muppet projects and other writing/production roles.