Gertrude Chandler Warner

Jessie and Henry's robotics team is competing in a big tournament. But when their robot is stolen, the Aldens have a high-tech mystery to decode!

"The old abandoned school in Silver City is being fixed up as an art center and the Boxcar Children volunteer to help clean up the place. But the other volunteers are scared by the spooky goings-on in the school--doors lock by themselves, and chalkboard messages appear out of nowhere! Will the Aldens find out the secret of the haunted school?"--

The Aldens visit Goldwin University, where Grandfather attended college. The old library is about to be torn down. But legend says the stone gargoyles guarding the roof of the old building will do anything to protect it--even fly. When the creatures begin appearing outside the windows, people are terrified. But the Boxcar Children think there is another reason the gargoyles are turning up in places they shouldn't. And they're determined to figure...

"Henry, Jessie, Violet, and Benny didn't think the old trunk in their house held anything interesting. But an unusual statue they find inside leads them to the Reddimus Society, a secret guild dedicated to returning lost treasures to where they belong. Now the Aldens must help their new friends by traveling across the country with the statue and six mysterious boxes! Can the Boxcar Children keep these seven treasures out of the wrong hands?"--