The Ankle Grabber by Rose Impey, 1989.

This book is part of the Creepies series, where children have fun imagining monsters. The stories are about the power of imagination and the fun of being a little scared. Sometimes, even though the children know that they made up the monsters themselves, they also get scared of their creations. Books in this series can be good for talking to children about how their imaginations can run away with them and scare them, but I’d use caution when introducing them to very young children because they can make nervous children more nervous by feeding their imaginations. These books would probably be best for ages seven and up. Fortunately, even when the kids’ imaginations run away with them, the stories always end in reality, and the hero of this story is … Dad!

Every night, a little girl has her mother check her room for monsters, but no matter how well her mother searches for them, the girl is still terrified of the monster who lives in an invisible swamp under her bed. She calls this monster the Ankle Grabber because she believes that if she isn’t careful, the monster will reach out from under the bed and pull her down into the swamp by her ankles.

But, as is inevitable when you’ve got a monster under your bed, the girl realizes that she has to go to the bathroom. Getting in and out of bed without being caught by the Ankle Grabber is a tricky proposition. The girl tries to get into and out of bed by jumping so that she can avoid the monster.

When she misses her jump back into bed and lands on the floor, her father comes in to see what’s wrong. Her father has scared off monsters for the little girl before, so he sticks his head under the bed to scare off the Ankle Grabber, too.

Nothing is so scary that Dad can’t make it better!

The book is available to borrow and read for free online through Internet Archive.