Grandpa Is a Secret Supervillain: Old Habits Die Hard (and Explode)

By PixelArt Studio Press

A retired supervillain. A washed-up hero. And a grandson who just wanted a quiet Tuesday.

When twelve-year-old Shaun discovers that his forgetful, cardigan-wearing Grandpa Joe was secretly the world-renowned Doctor Disaster, his life takes a sharp turn into the absurd.

Grandpa's secret underground lair is waking up, and the city of Maplewood is under siege by rogue breakfast appliances and jetpack-wearing pigeons. Alongside his Grandpa and the legendary (but extremely creaky) Captain Thunderstrike, Shaun must navigate a world of high-tech chaos and sentient glitter to stop a "Sugar Bomb" from leveling the city.

Grandpa Is a Secret Supervillain is a hilarious, fast-paced adventure for fans of The Incredibles and Captain Underpants. It explores the messy, explosive, and ultimately heartwarming bond between a boy and the most dangerous man in a brown cardigan.

Themes: Intergenerational relationships, STEM-humor, superhero parodies, and family secrets.

• Format: Paperback
• Language: English
• ISBN: B0GSSNP6NR
• ISBN13: 9798233483868
• Release Date: March 2026
• Publisher: Pixelart Studio Press
• Length: 244 Pages
• Weight: 0.63 lbs.
• Dimensions: 0.6" x 5.5" x 8.5"
• Age Range: 9 to 12 years
• Grade Range: Grades 4 to 7