A field trip to Washington, D.C. turns into a middle-grade mystery! In this Field Trip Mysteries book, sixth-grader Edward "Egg" Garrison and his friends travel to the nation’s capital. But when they arrived at Union Station, people scream and flee the popular landmark. They’ve seen a ghost, the ghost of George Washington, the first U.S. president! The four friends find themselves smackdab in another mind-bending mystery. And if they don’t act fast, the United States Capitol will soon become a haunted house.