It is 1914, and as the war draws the young men of Britain away to fight, women must keep the nation running. Two of those women are Peggy and Maude, twin sisters who live on a narrowboat in Oxford and work in the bindery at the university press.

A gripping historical mystery for fans of Kate Morton and Natasha Lester’s The Paris Seamstress, The Cartographer’s Secret follows a young woman’s quest to heal a family rift as she becomes entangled in one of Australia’s greatest historical puzzles.

Food critic Tempèsta Luddington has always felt like the odd person out in her family, ever since she lost her beloved mother at the tender age of thirteen. When her workaholic father passes fifteen years later, Tempèsta is not surprised that the majority of the considerable family money will pass to her dutiful younger brother, Wal. Still, she is left a modest remembrance from her mother, and for the first time Tempèsta has a world of choices before her.

Cornwall, 1730: A young girl known only as Red travels with her father making a living predicting fortunes using the ancient Cornish method of the Square of Sevens. Shortly before he dies, her father entrusts Red’s care to a gentleman scholar, along with a document containing the secret of the Square of Sevens technique.

When human bones are found beneath an old chapel in the woods, evidence suggests the remains could be linked to the decades-old case of missing teen Annalise Jansen. Homicide detective Jane Munro—pregnant and acutely attuned to the preciousness of life—hopes the grim discovery will finally bring closure to the girl’s family. But for a group of Annalise’s old friends, once dubbed the Shoreview Six by the media, it threatens to expose a terrible pledge made on an autumn night forty-seven years ago.