Ricky Ricotta's Mighty Robot vs. The Unpleasant Penguins from Pluto (Ricky Ricotta's Mighty Robot #9)
Written by Dav Pilkey with illustrations by Dan Santat

• Publication Date: May 31, 2016
• Genres: Children's 4-8, Fiction, Friendship, Science Fiction
• Paperback: 128 pages
• Publisher: Scholastic Inc.
• ISBN-10: 0545630177
• ISBN-13: 9780545630177