Henry, Jessie, Violet, and Benny once lived on their own in a boxcar ... The Alden children discover that a mystery surrounds a run-down yellow house on Surprise Island. Years ago, a man vanished from the house, but nobody knew how or why. Now the children find a long-lost letter. Soon the clues lead them on a trail to new adventures, and an old mystery solved!Warner, Gertrude Chandler is the author of 'Yellow House Mystery', published 1989 under ISBN 9780807593660 and ISBN 0807593664.