The Mattigan kids are off to Las Vegas with their dad who plans to prove there are no aliens on the loose there, but the kids want to find out once and for all what's hidden in the notorious…

The Mattigan kids don't believe in things that go bump in the night, but when their long-lost Grandpa Joe shows up with his Mysterious Monsters journal, the siblings find themselves drawn…

The Mattigan kids have solved the mystery of their monsters' history and their own, but then they learn there's an evil and mysterious creature coming for them. Aligned to Common Core…

It is getting harder to hide the monsters in "Motel Mattigan" from their dad. The Mattigan kids are eager to collect a new creature, but sorting out the truth will force them to look inside…

While their dad searches for evidence to prove the spooky Vampire House's blood-sucker is fake, the Mattigan kids set out on a search of their own, even if their clever plan could be a recipe

The Mattigan kids convince their dad to go on a mission to find a werewolf, and they are determined to help the monsters hiding in their basement uncover the truth about their pasts. Aligned…