Mr. Morton organizes a gift exchange for the whole class, but does that mean the ghosts are included, too?

The new boy in Nina, Jeff, and Cassidy's class is strange! He's see-through. He floats above his chair. And he never seems to leave the classroom. Could the new boy be a new ghost? Nina and her friends are afraid to find out. And so are the other ghosts! Could this mean more fun for the class in the basement, or more haunting?

Mr. Morton's third graders are all set to turn the school basement into a haunted house for their family and friends. The problem is ... the basement is already haunted!

Field Day is going to be a nightmare for Cassidy because she can't run or kick or bat as well as her friends. But there is one thing she is really good at-- finding out ghostly secrets.

"Boo! The dogs at Barkley's School are spooked! Toys and treats are disappearing from the schoolyard--and a ghost may be the reason! Is Woodrow right about the legend of the ghost dog?"

"The secret is out! Well, all of the third-graders' secrets are out. A tattletale is loose in the basement of Sleepy Hollow Elementary and suddenly rumors are spreading about everyone. Now the class is playing the blame game. Is Cassidy the blabbermouth? Is Jeff the Big Mouth? Or is someone--or something--else spying on the basement class? Nina is ready to do whatever it takes to catch the snitch. But would she be willing to tell on her best friends?"--Cover,...

When the children at Sleepy Hollow Elementary hold an all-night reading marathon to win a brand-new computer, they read about a treasure hidden in their own school basement and the Read-a-Thon quickly turns into a treasure hunt.