First Class Murder, Robin Stevens

First Class Murder is a young adult novel by Robin Stevens. The terrifying third instalment to a series of murder mysteries, it follows Daisy Wells and Hazel Wong at Deepdean school for girls. They are on their holidays, and travelling on the notorious Orient Express of Agatha Christie fame. Of course, it isn't long before one of the passengers is murdered and the two school girls are after the mysterious attacker. 

A Murder Most Unladylike series takes place at an unusually dangerous girl's school in which two junior detectives must unravel dangerous mysteries. Each of the 10 volumes tells an individual story and can be read as a standalone. 

Sherlock Holmes meets Harry Potter, each of the books contain short, accessible chapters as well as detailed illustrations, a fantastic stepping stone for young readers on their way to more advanced literature.