Robert Papp

In 1777 Philadelphia, young Maddy Rose spies for General Washington's army by using an unusual code to communicate with her soldier brother.

The Alden children stumble upon a mystery when they enter their dog, Watch, in a contest that could lead to fame and fortune, but where things keep going wrong.

The four Alden children, aged six to fourteen, volunteer at the new recycling center in town, and help uncover who is breaking in and making a mess each night.

Encyclopedia Brown, boy detective extraordinaire, solves ten new cases, including "The Case of the Miracle Pill," "The Case of Nemo's Tuba," "The Case of the Lawn Mower Races," and "The Case of the Air Guitar." Solutions provided at the end of each chapter.

When the Aldens agree to watch the house of a local author who has written a book about a vampire, they end up investigating activities that are suspiciously similar to those in his book.

"This autumn adventure for the Boxcar Children takes the Aldens to a New England farm that has more than its share of strange occurrences. Every year at the Beckett farm, visitors come to buy pumpkins and go on hayrides, but this year something is haunting the farm -- a mysterious specter with a glowing pumpkin head that warns guests to stay away! It's up to the Aldens to find out who or what is behind the scare."-- Provided by publisher.

The Aldens help out at a minor league stadium and investigate when it appears someone in the ballpark is stealing the home team pitcher's signals and relaying them to the batters of the other team.

The Aldens discover there's nothing more fun than a drive-in movie. But pranks and other odd things are happening at the Diamond Drive-In, and late at night, a ghost is seen walking around the empty lot. Is the old theater really haunted?

When the children uncover a strange puzzle in a friend's back yard, it's the start of a "spy game" leading to gold. But first they must make sense of an old photo and a riddle, and learn just who is behind this mystery within a mystery.

The Aldens investigate the rumors of ghosts, disappearing props and a haunted seat in the Trap-Door Theater.