Dana Girls Books in Order

Louise Dana is mistaken for an escaped prisoner and pursued by a former reformatory warden. Seeking shelter with a local hermit draws Louise and her sister Jean into a mystery involving the missing girl and hidden secrets.

Louise and Jean Dana befriend a family after a plane crashes into their uncle’s ship. Discovering a box of possibly stolen money, they guard it from a thief while trying to identify its rightful owners.

Louise and Jean Dana accompany their headmistress to a proposed summer camp at Moon Lake. The house seems haunted, and someone occupying a locked attic room emerges only at night, giving the sisters a new mystery.

Louise and Jean Dana trace a woman who disappeared from their uncle's ship to a strangely troubled house. When several people fall into prolonged unconsciousness there, the sisters investigate whether a poisonous herb explains the mysterious sleeping spells.

Jean and Louise meet a former servant who hints at a secret she has kept for her employer. When he questions the girls and later disappears, suspicious efforts to seize the servant's belongings deepen their investigation.

Jean and Louise's Christmas visit to Highfort becomes a property dispute when several people claim ownership and their host disappears. A stolen jeweled star and a nighttime intruder add further puzzles as the sisters try to establish the truth.

Jean and Louise rescue Jasper Conway and important papers from a fire started by Oliver Gormly. Refusing to surrender the documents makes the sisters his enemies, and they investigate a swindling operation whose victims include an uncooperative schoolmate.

A pottery teacher asks Jean and Louise to find her missing fiancé, an FBI agent whose boat has washed ashore. A secretive hermit and unexplained cries near a cliff complicate their efforts to discover whether he survived.

Arlene Sherwood disappears after a psychic's ominous prediction, and her father soon vanishes too. Jean and Louise suspect abduction when a message demands valuable drawings be left in an old well, prompting a risky attempt to outwit the kidnappers.

Louise and Jean visit a friend at Webster College, where a chapel bell is linked to rumors of a ghost. The sisters investigate the haunting and a hidden treasure intended to support the chapel.

A new French student at Starhurst puzzles Jean and Louise with her secrecy and reluctance to join the archery team. Stolen jade rings deepen the mystery, and the sisters try to help her.

Strange happenings around an old inn draw Jean and Louise into a mystery involving a stolen spoon. They also help a girl escaping a forced marriage and a man accused of taking a silver tray.

Jean and Louise's school musical rehearsals are disrupted by ghostly figures, moving armor, and other disturbances at Mozart Hall. When their original song is stolen, the sisters face another mystery that threatens their contribution.

A stranger's determination to buy Louise's artificial black orchid puzzles the Dana sisters. When the flower disappears during their summer-camp visit, they investigate its hidden importance and possible connection to long-missing twins.

A violinist's urgent message about a winking ruby sends Jean and Louise to Europe with their uncle. During the voyage, a pair of hypnotists offers help that the sisters disagree about accepting.

A European trip brings Jean and Louise a request for help from Prince Rudolph Krisler. Their pursuit of the mystery takes them through Germany and Switzerland, where an abandoned chalet becomes part of the investigation.

Jean and Louise vacation near Chincoteague, hoping to see its wild ponies. A ghostly sailing ship appearing in the mist and a missing captain draw the sisters into a mystery around the lagoon.

Jean and Louise help a friend search for a stolen gilded Garuda bird containing a valuable jeweled statue. Their investigation takes them to Bangkok, where the missing object presents a mystery for the sisters.

Jean and Louise investigate a stolen ring and a family's lost gold in California. A partly burned letter and a missing grandfather lead the sisters toward the Sierra Nevada and clues from the Gold Rush.

After a train wreck in the Rockies, Jean and Louise search for a lost German shepherd. Their quest leads toward a lake, a town buried by a landslide, and rumors of a witch.

A mysterious black-robed intruder appears inside a museum and seems able to pass through walls. Jean and Louise investigate the disturbance and its connection to a white marble tiger given by a maharajah.

An anonymous warning tells Professor Crandall not to move a newly purchased bronze fountain to Starhurst School. Louise and Jean investigate, following strange clues involving ice skaters and a frightening figure while threats complicate their search.

Louise and Jean help Judy Platt search for the silver dolphin named in her brother's will. Uncertain what the clue means, they follow leads from Miami to a Caribbean island while rivals scheme to claim the reward.

Louise and Jean's spring vacation becomes an investigation involving a wax bust of Queen Victoria, a stolen diamond, and a dubious car raffle. A Greenwich Village sculptress and suspects using disguises complicate their race to solve the puzzle.

Louise and Jean sail to Portugal to investigate thefts from a friend's cork warehouse. Before arrival, a thief's interest in a young minstrel's guitar presents another puzzle, leaving the sisters to discover whether their two cases connect.

Louise and Jean spend spring vacation in a seaside town restoring its Victorian character. Lumber thefts, lighthouse signals, and a surfer who disappears before reaching shore pull them into an investigation of sabotage threatening the project.

Repeated invitations to a teenage pageant draw Louise and Jean into the search for a stolen jeweled crown. A mythical bird statue offers a clue, while the kidnapping of a contestant makes their investigation urgently personal.

Louise and Jean search Beacon College for treasure promised to the school at its centennial. A missing codicil may reveal its location, but extortionists and repeated sabotage threaten the sisters before they can unravel the century-old secret.

Louise and Jean search for a duplicate manuscript containing a disclosure by an orphan's grandfather. Unknown enemies also want the document, turning their effort to recover the secret into a dangerous race against people determined to stop them.

An uninvited witch interrupts Louise and Jean's Halloween party, claiming to guard the storm petrel. A fire discovered after the visitor leaves starts a chain of mysteries and dangers surrounding a secret group the sisters must investigate.