'Something just happened, and I'm going to put it in my book, which is filling up faster than I expected. I don't know exactly what the new happening means, but I can tell it means something...'. Josie Green and her sister just don't get on - in fact, sometimes she thinks they can't even be related, they're so different. Then, Josie declares herself 'Josie Green, Family Detective' for a school project, and she can't wait to get started. But, when she comes across secrets she wasn't meant to discover, things start getting out of hand. Maybe there is more to Josie's family than she thought? Confused and angry, Josie is determined to unravel the truth. But, when she finally succeeds, it is even more shocking than she imagined..