Hidden Rainbows — Maxine Barry

When Persis Canfield-Hope finds her grandmother's diaries dating from 1938, she decides it would be fun to follow in her footsteps and cross the great continent of Australia from coast to coast via train. On board, she meets the charming and enigmatic Dane Culver but has no idea that he has a hidden motive in befriending her - one that involves a fabulous and purloined jewel! Also on board is another English woman, Rayne Fletcher. She's there as an investigator for an insurance company, and is simply out to nail fraudster Avery McLeod - so falling in love with him was definitely not on the agenda. Unfortunately for them both, the real criminal has an agent on board who is determined that neither of them will live to see the journey's end.