Hattie Big Sky by Kirby Larson
I absolutely love this book. It is wonderful, fantastic, terrific! In fact, since it came out, I have read or listened to it about thirteen times. This book is considered a teen novel, but I can't think of an adult who would be disappointed by this adventure story.
Hattie is a 16 year old orphan who is suddenly given the opportunity to prove up on her deceased uncle's claim in Montana. This is a pioneer adventure with a twist. Instead of Laura Ingall's time, Hattie is homesteading in Montana during World War I. The best part of all is that the story is based on Kirby Larson's great aunt's real life. Wonderful, wonderful!