Mauro Sorghienti: 5 books

With Bigfoot safely stashed in their basement, Maddie, Max, and Theo Mattigan are off to Las Vegas with their dad. His plan is to prove there are no aliens on the loose there.  But now that his kids know Mysterious Monsters are real, they're making plans of their own. They'll need clever...

Maddie, Max, and Theo have come to the most haunted neighborhood in the most haunted city in America—and they're staying in the spooky Vampire House. While their father searches for evidence to prove its blood-sucker is fake, they set out on a search of their own through a city of the dead to a...

Things are getting complicated for Maddie, Max, and Theo. After all, it's not easy to hide a Sasquatch, an alien, and a vampire in your basement. So it's a relief to head out on another mission with their dad, this one to prove a small town Oregon boy couldn't really have been possessed by a ghost....

The Mysterious Monsters hiding in the Mattigan's basement have discovered they have something in common. When clues about this link point to an island in Canada, one where a werewolf has recently been sighted, Maddie, Max, and Theo convince their dad it's time for one more mission. The kids are determined...

Maddie, Max, and Theo Mattigan know everything now. They've solved the mystery of their Monsters' history, and even of their own. But Happily Ever After doesn't seem to be how their story was meant to end. There's an evil creature out there, more mysterious and monstrous than anything they could imagine. And it's coming for them. This time, the hunters have become the hunted.