The silver box is a story suitable for nine-year-olds. At the beginning of the school holidays Ben Wilson and Scarlett Bennett, find a silver box hidden under the floor of and old outhouse in Ben's garden. They soon discover that only Ben can open the lid of the box and, when he does, the pair are amazed to find that they are able to travel back into the past and also forward into the future. Danger lurks around every corner during their adventures and with each journey the box changes its appearance. The children need to unravel the mystery of why only they can see it as a silver box, whilst everyone else thinks it's just made of wood. It soon becomes obvious to Ben and Scarlett that they have to solve the mystery before the end of the school holidays or risk being trapped in the past for ever.