Hazel sets out to prove that she, not her baby brother, is the worst monster anywhere.

Hazel sets out to prove that she, not her baby brother, is the worst monster anywhere. Since the Baby Monster arrived, no one notices big sister

Zack's plan to scare his pesky sister goes awry when he buys defective monsters from the Monstore.

Monsters, witches, and even a dragon quake in fear when a prank transforms an ordinary person into a terrible beast.

Eleven-and-a-half-year-old Valentina Salazar grew up as a monster protector until her father's loss, but when a video of a mythical egg appears,

When their scientist father moves them to a new home next to a swamp, Kelli and Shawn hear stories about a terrifying, ancient beast that inhabit

Fifteen-year-old Loch and his younger sister join their father on a scientific expedition searching for enormous prehistoric creatures sighted in

Students at Washington Irving Elementary School are turning into monsters, including Sebastian and Angie, so when their little brother Rory turns

Puppy siblings Andy, Penelope, and Jack help their sister Petra overcome her fear of a nighttime monster.

"Sibling adventurers Leah and Alan set out on a journey to correct the balance of nature, traveling through a breathtaking world of fantasy"--

Lucha Libre champion Niño has no trouble fending off monstrous opponents, but when his little sisters awaken from their naps, he is in for a no-h

Henry and Eve, having ignored their father's warning, are kidnapped by monsters who eat whiney children, but while increasing numbers of monsters