Myrtle Hardcastle Mysteries Books in Order

Sent on a seaside holiday, Myrtle Hardcastle meets an investigator guarding a priceless tiara aboard their train. When jewels vanish and a body appears, Myrtle follows the evidence among fellow passengers despite the disruption to her aunt's plans.

Twelve-year-old Myrtle Hardcastle studies criminal science despite Victorian expectations for young ladies. When her wealthy neighbor dies suspiciously, she and governess Miss Judson investigate, determined to prove murder even when the adults around them dismiss her suspicions.

A shopkeeper dies before unveiling his Christmas display, and subsequent killings seem foretold by its rearranged figures. Myrtle Hardcastle investigates an old scandal linked to his archaeological career, seeking the connection between a buried case and present revenge.

Myrtle investigates a girl claiming to be a long-lost heiress, but her father's hospital stay introduces another mystery. After he reports witnessing a murder without a body, she searches for evidence while worrying he may be in danger.