The Mystery of the Secret MessageGertrude Chandler WarnerThe Boxcar Children, book 55

Characters in The Mystery of the Secret Message

5 characters, main characters first.

Supporting characters

Mr. James Henry Alden
Also in The Mystery of the Mixed Up Zoo, The Camp Out Mystery, The Mystery Cruise, The Mystery in the Snow, The Mystery Horse, The Mystery Bookstore, The Mystery of the Stolen Boxcar, The Mystery of the Lost Mine, The Hurricane Mystery, The Panther Mystery