Andrea and Jamie, 9 and 7 years old, are siblings, and this summer they're going to spend a few days with their grandmother because their parents have won a raffle and are going on a trip.

Their parents' instructions are very clear: "Be very good," "Take good care of Grandma," and "Grandma is very old, look after her."

However, left alone with their grandmother, Andrea and Jamie are in for a huge surprise. Grandma may not be as boring as they had thought after all ...

A fun book with humor, action and adventure for boys and girls!

Recommended reading for children aged 7 and up.