First Class Murder. Murder Most Unladylike (A Murder Most Unladylike Mystery)

The third gripping mystery starring Daisy Wells and Hazel Wong, set on the glamorous Orient Express.
     Daisy Wells and Hazel Wong are taking a holiday through Europe on the world-famous Orient Express. From the moment the girls step aboard, it's clear that each of their fellow first-class passengers has something to hide. Even more intriguing: rumour has it that there is a spy in their midst.
     Then, during dinner, there is a bloodcurdling scream from inside one of the cabins. When the door is broken down, a passenger is found murdered, her stunning ruby necklace gone. But the killer is nowhere to be seen -- almost as if they had vanished into thin air.
     Daisy and Hazel are faced with their first ever locked-room mystery -- and with competition from several other sleuths, who are just as determined to crack the case as they are.