It's the Pretty Big All City Read and Izzy and Barb are all set up, that is, until all the books end up missing on account of the yip yips. Now, the Mechas need to locate the books and get them all back to the library before the event starts. / Pretty Big City finds itself in a sticky situation when the factory starts spewing super sticky slime everywhere! The Mechas need to clean up the city and help Marwyn rescue his food truck from a giant pile of slime on the road.