Trixie Belden and the mysterious code

Series: Trixie Belden

• The secret of the mansion (Volume 1.)

• The red trailer mystery (Volume 2.)

• The gatehouse mystery (Volume 3.)

• The mysterious visitor (Volume 4.)

• The mystery off Glen Road (Volume 5.)

• The mystery in Arizona (Volume 6.)

• The mysterious code (Volume 7.)

• The black jacket mystery (Volume 8.)

• The Happy Valley mystery (Volume 9.)

• The marshland mystery (Volume 10.)

• The mystery at Bob-White Cave (Volume 11.)

• The mystery of the blinking eye (Volume 12.)

• The mystery on Cobbett's Island (Volume 13.)

• The mystery of the emeralds (Volume 14.)

• The mystery on the Mississippi (Volume 15.)

• The mystery of the missing heiress (Volume 16.)

• The mystery of the uninvited guest (Volume 17.)

• The mystery of the phantom grasshopper (Volume 18.)

• The secret of the unseen treasure (Volume 19.)

• The mystery off Old Telegraph Road (Volume 20.)

• The mystery of the castaway children (Volume 21.)

• The mystery on Mead's Mountain (Volume 22.)

• The mystery of the queen's necklace (Volume 23.)

• The mystery at Saratogae (Volume 24.)

• The Sasquatch mystery (Volume 25.)

• The mystery of the headless horseman (Volume 26.)

• The mystery of the ghostly galleon (Volume 27.)

• The Hudson River mystery (Volume 28.)

• The mystery of the velvet gown (Volume 29.)

• The mystery of the midnight marauder (Volume 30.)

• The mystery at Maypenny's (Volume 31.)

• The mystery of the whispering witch (Volume 32.)

• The mystery of the vanishing victim (Volume 33.)

• The mystery of the missing millionaire (Volume 34.)

• The mystery of the Memorial Day fire (Volume 35.)

• The mystery of the antique doll (Volume 36.)

• The pet show mystery (Volume 37.)

• The Indian burial ground mystery (Volume 38.)

• The mystery of the galloping ghost (Volume 39.)