ISBN-13: 9780595442201 / Angielski / Miękka / 2007 / 76 str.
Four children vacationing for the summer with their parents at their cottage in Northern Michigan find a very old bottle under some exposed tree roots along the shores of the lake. Inside they found a clue which suggested there might be a treasure buried somewhere close. This begins a hunt which leads the children to subsequent clues and finally, by summers end, the treasure.