The 8th book in the series , it released in 2016 after spending over a decade in development hell .
Ricky Ricotta 's Mighty Robot vs. the Naughty Nightcrawlers from Neptune ( 2016 ) is a children 's novel by Dav Pilkey and illustrated by Dan Santat .
The 8th book in the series , Ricky Ricotta 's Mighty Robot released in 2016 after spending over a decade in development hell .
Ricky Ricotta 's Mighty Robot vs. the Naughty Nightcrawlers from Neptune ( 2016 ) is a children 's novel by Dav Pilkey and illustrated by Dan Santat .