Some great books here. Not very old. In great shape. Each book's plot is below in the description.

Adventure Childrens Books (Set of 4) Scholastic Flat Stanley, Mermin, Hardy Boys.

A Jiggy McCue Story
by Rudie Dudie
Jiggy's new Drama teacher thinks he's an ass. And to prove it, she makes him wear a donkey's head. But that's not all. She makes him do really embarrassing things...really rude things...in public!
***this book contains some adult language***

The Hardy Boys: Cast of Criminals
by Franklin W. Dixon
Bayport's Grand Theater is putting on a murder mystery, and Frank's girlfriend, Callie, is the star of the show. But she's also in the middle of a real-life mystery - a backstage intrigue in which her life may be in real danger.

The only clue the Hardys have to go on is the theft of a tiara Callie planned to wear onstage. Someone has threatened to make this the last part she ever plays unless she finds the missing prop. The show must go on, but the final act could be murder if Frank and Joe don't puzzle out the plot.

Flat Stanley: His Original Adventure
by Jeff Brown
Stanley Lambchop is an ordinary boy. At least he was, until the night hus bulletin board fell off the wall and flattened him. All of a sudden, Stanley can slide under doors, mail himself across the country in an envelope, and fly like a kite.

But flatness has its serious side, too. Sneak thieves have been stealing paintings from the Famous Museum of Art, and Stanley knows he's the only one who can stop them. Will the robbers discover Stanley's plan before he foils theirs?

Mermin Book One: Out of Water
by Joey Weiser
"Mermin the Mermin from Mer?"

That's the question Pete and his friends ask after finding the fish-boy washed up on the beach! Mermin just escaped the undersea kingdom of Mer, and is ready to have some fun on dry land! Mermin is a little odd: he can talk to fish, and packs quite a punch. But why would this aquatic kid be afraid to swim? Perhaps it has something to do with the fishy pursuers who have followed him from the depths below!