The stolen sapphire / Buckey, Sarah Masters

When an archeologist's priceless jewel goes missing during a 1906 ocean liner voyage to Europe, eleven-year-old Samantha tries to discover which of the first-class passengers is the thief.

On an ocean liner headed to Europe in 1906, Samantha and Nellie set out to find an archaeologist's legendary sapphire that has gone missing, investigating every first-class passenger. Includes an informational section on ocean liner travel in this period and a glossary of French words used in the story.