Nancy's Mysterious Letter by Carolyn Keene, narrator: Jessie Birschbach

Ira Dixon, Nancy's mail carrier, is about to retire. It's his age that has her offering him a ride during a violent storm and then setting him up with a hot beverage. It is her kindness that kicks off the mystery when the last of his mail is stolen from their front porch, including a note for Nancy and a package for her father. This puts his job, and his retirement, at risk.

Ira remembers just enough about the letter that Nancy can back track and find out that it came from a law firm in England. It wasn't actually meant for her. Nancy Drew has inherited a large sum of money and, so far, our Nancy is the only one they've found. But, coincidentally, Nancy Smith Drew is helping with a play at Ned's university. Do the two mysteries link up? Yes, but it's a very thin thread. 

Three stars

Nancy Drew Mystery Stories #8

Follows The Clue in the Diary

Followed by Nancy's Mysterious Letter

This book came out in 1932

Borrowed as audiobook from Libby

Opinions are my own