Sesame Street Mecha Builders Episode 7 Yip Yip, Book Book! / Stick to It! Episode Title: Yip Yip, Book Book! / Stick to It! Episode Description: t’s the Pretty Big All City Read and Izzy and Barb are ready, that is, until all the books go missing! Note:This episode features a special appearance by the Martians. Pretty Big City finds itself in a sticky situation when the factory starts spewing super sticky slime everywhere!