Piper Sail is a high society school girl. She dreams of going on dates and hanging out with her best friend, Lydia. When Lydia disappears one night, Piper is devastated. She wonders how a rich girl could simply vanish in one night. She looks for information with the police, but she is convinced that they are looking in the wrong place. Piper decides to start her own investigation with the help of a handsome detective. Piper is surprised that her clues lead her into the heart of Chicago’s most dangerous mafia.

I really adored Piper. She was a very fun character. I particularly loved her friendship and loyalty to Lydia. She would do anything, including putting herself in danger, in order to bring her friend back safe and sound. Piper is also very intelligent. She notices small details that others would not have noticed. This is not to say that Piper was not without flaws. There were many times that she was so emotional that she became hysterical. She also acted without thinking, which almost got her into danger. Despite these weaknesses, she was a good-hearted girl that cared about her friends and family.

Overall, this novel is about friendship, justice, and loyalty. All the characters were well-rounded and likable. The novel is also well-written and filled with many details of the1920s Chicago mafia world. The only thing I did not like about this book was the killer revealed the identity on their own rather than letting Piper solve who the killer was. Still, The Lost Girl of Astor Street is a fast-paced mystery that has a dash of action and romance! It will leave you wanting more! I hope that there will be a sequel, for I would love to know what lies in store for Piper’s next adventure!
As for the narrator, she was splendid!