"This bittersweet middle grade novel follows the ghost of Denis Egan as he teams up with his living twin brother to solve the mystery of his death."-- Amazon.com.

When the guardians of the Copernicus legacy are targeted for assassination by the evil Galina Krause, Wade, Darrell, Lily, and Becca must find the remaining relics to defeat their enemies.

As Badger Point School is preparing to celebrate its 100th anniversary, the statue of its founder, Simon Plunkett, goes missing but the Goofballs are quickly on the case, looking for evidence and following clues.

In the touristy town of Cape Cod, eleven-year-old Owen faces a dilemma when his best friend Sean is sexually abused by a trusted adult, but warns Owen not tell anyone what is happening.

It's a dangerous time in Droon when a mysterious ancient sorcerer arrives, waking the infamous Warriors of the Skorth.

"The Goofballs are invited to a superhero masquerade to stop a mysterious figure from stealing a priceless collection"--

"Wade, Lily, Darrell, and Becca fly from Texas to Germany for the funeral of an old family friend. But instead of just paying their respects, they wind up on a dangerous, mind-blowing quest to unlock an ancient, guarded secret that could destroy the fate of the world"--

"It's been two months since the Kaplan family hunted down the Serpens relic, but when the evil Galina Krause suddenly and violently reappears, Wade, Darrell, Lily, and Becca have no choice but to face her again. Now they must race to find an artifact said to be crafted by Leonardo da Vinci himself--perhaps the strangest Guardian of all. Along the way, they uncover another layer to Galina's sinister endgame--and and there might not be enough time to...

Eric's restless dreams mean Droon is calling him back. There he finds someone is stealing dreams, and he must track him down.

Krog, the snowy beast, lives in the ice caves of Krog. Eric and his friends have to stop the monster from causing too much trouble.