Kay Tracey Books in Order

A young man with lost memories mistakes Kay Tracey for his missing sister. Kay tries to restore his memory and locate the girl, but his reaction to a red scarf points toward a dangerous hidden story.

An unseen voice warns Kay Tracey and her friends away during a visit to Lost Lake. As strange incidents frighten vacationers, Kay investigates while helping an elderly man search for a long-lost family fortune.

Kay Tracey’s adopted friend Sissy learns that she could inherit a fortune if she proves her birth identity. An anonymous letter, destroyed records and a missing witness complicate Kay’s effort to uncover the truth.

When Mrs. Van Hutton refuses to sign a legal document, Kay Tracey suspects a man named Stannovi is influencing her. A warning to stop investigating deepens the mystery, while her school rival obstructs her search.

After Kay Tracey exposes a fraudulent medium, the woman threatens her with a curse. A bride-to-be then vanishes from a wealthy family’s estate, and a distinctive green cameo becomes an important clue in Kay’s search.

Kay Tracey joins the search for a kidnapped movie star and follows clues into a stolen-goods operation. Investigating the thieves’ hiding place puts her in danger, making escape another challenge alongside finding the missing actress.

Kay Tracey finds an abandoned baby beneath bushes at a lonely farm and tries to discover its identity. At the same time, her rival Ethel disappears, drawing Kay toward a scheming couple and a blackmail plot.

A thief steals money Kay Tracey has been guarding, leaving her to recover the treasure and determine its owner. A ragged old man and a young woman’s wedding plans provide competing clues to the baffling case.

Kay Tracey interrupts a robbery at the Crowley sisters’ house, raising questions about the valuables hidden there. Her investigation across nearby sand dunes brings clues about a missing young couple and other mysterious figures.

A staged snake attack leads Kay Tracey toward Moleson Mansion and a portrait that disappears and reappears. Questions about its subject, a missing heir and a valuable treasure place her against a group of determined thieves.

Strangers greet Kay Tracey as if they know her, leaving her puzzled about a mysterious double. With Betty and Wilma's help, she follows the clues to an old mansion's sunken garden and a ghostly figure moving there.

After finding her friend Rosa bound and gagged, Kay Tracey searches for the stolen Stradivarius violin that belonged to Rosa's father. A numbered key leads her toward an antique dealer and increasingly dangerous attempts to recover the instrument.

Searching for missing Emily Dodd in Florida, Kay Tracey investigates an old fort and a tower on Jasper Jackson's property. His hostility toward Emily's mother and strange events at the estate raise suspicions about his connection to the disappearance.

During a library fire, Kay Tracey spots thieves taking valuable art and follows their truck. Investigating the thefts leads her toward a fire-worshipping cult, while suspicious evidence against an elusive man and Ethel's interference complicate the case.

Kay learns that Miss Janey has inherited a valuable chemical formula, but its papers have vanished and someone else claims the discovery. Proving the theft becomes essential to protecting her inheritance while Kay follows the missing research.

Fires, thefts and frightening nighttime disturbances plague Owl's Hole, a summer resort Kay Tracey is asked to investigate. A single footprint begins her search, but fleeing suspects and Ethel's interference threaten her attempts to trap the troublemaker.

Kay Tracey spots an intruder prying open a staircase step in the deserted Greely mansion. The hidden space presents a puzzle that also involves her lawyer cousin's efforts to sell the estate and her school rival's meddling.

Despite warnings that their houseboat is jinxed, Kay and the Worth twins embark on a river holiday. Armed men aboard a neighboring boat and coded signals to shore suggest a connection with a series of unsolved jewel thefts.