When Jed, Bill and Liz Roberts go to their grandparents house as usual for the summer, they never expect anything to be different...but it is.
The story of an old and mysterious picture - one showing an ancient Indian bonnet, Indian pot, a key and a question mark - is re-told, and the three children discover a clue to its mystery. Soon the three are on a treasure hunt - but will they find the treasure, or will they fail?
I like this book because each clue is a puzzle, and you can (mostly) discover the answers on your own if you try. Also, I like the characters. I highly recommend this book to all readers.