Since it's a true story about 'the little book of goodluck', it may chronicle the journey of the book itself. It could be about how the book was discovered, passed around, and how it brought good luck to different individuals. It might detail the specific events and circumstances where the good luck occurred, such as someone winning a lottery after coming across the book or a sick person getting better suddenly. The book might also have some unique features or stories associated with it that make it special in terms of bestowing good luck.
Well, it could be that the book tells a true story centered around a small book that has some sort of significance when it comes to good luck. Maybe it contains stories of people who found the book and then had their lives changed in a positive way, like getting a new job or finding true love.