The Secret of the Night Train
Max is going to be travelling to see her great Aunt Elodie, when she finds out that a diamond stealer is on the same train as her. When the suspects are cut down to only 4, Max gets pulled into a mystery with the help from her mum, Sister Marguite.... I found this book one of the best I have ever have, so I obviously gave it 5/5! I loved the main storyline, a mystery, and all the characters. I have already read two Sylvia Bishop books now and would definitely recommend them to ages 10+!