Trixie Belden and the Mystery on the Mississippi (1965)
Trixie Belden and the Mystery on the Mississippi is a 1965 trixie belden (fictitious character) book written by Kathryn Kenny.
Trixie Belden and her best friends are invited to spend a vacation near the Mississippi and find a mysterious man that seems to be up to no good. They decide to go find out. Spoiler alert if you hate scary stories don't read this book Trixie is in danger of dying MANY times.