The Adventures of the Northwoods series, written by Lois Walfrid Johnson, takes place in the early 20th century. The main character is a lively, curious girl called Kate O’ Connell. Her father is dead and her mother remarries, to a Swedish man who has 2 sons and 1 daughter and lives inWisconsin. Kate does not want her mother to marry again but she gradually gets used to her new Swedish family and their customs. Kate ends up solving an exciting mystery with the help of her older step-brother Anders and his friend Erik. This leads to her solving lots more mysteries. I like the series because Kate is very courageous and because the books are so exciting. I would recommend the series for ages 9 and up.
(NOTE: The books were my mom’s when she was a little girl. There are 10 books in the series.)