“The Mostly True Story of Tanner and Louise,” by Colleen Oakley It is no coincidence that the title of this book brings up memories of the famous “Thelma and Louise” movie. There is a road trip involved as well as some law-breaking. And, indeed, this would make a good movie, too. Tanner is a young adult woman who is at loose ends in her life. She was an aspiring collegiate athlete until an injury ruined her career plans. Now she is a college dro…