Laura Purdie Salas is the author of more than 100 books for kids and teens. Her work has received the Minnesota Book Award and other honors, including  Bank Street Best Books of the Year, and NCTE Notables. She and her husband live in Minnesota and have two monsters of their own, Maddie and Annabelle. When Laura's not reading or writing, she likes to dance, play games, and work with the Minnesota Brass drum corps (which involves a lot of Counting, following Patterns, and creating Shapes on the field). She tries to eat More vegetables and Less brownies, but that is hard! Learn more about Laura at laursalas.com.

Nadia Higgins is the published author of more than 70 books for kids and young adults. In addition to weird inventions, she has written about explorers, national parks, outer space, pop stars, and zombies. Higgins lives in Minneapolis, Minnesota with her husband and two daughters.