On the day of his granddad's funeral, Tommy makes a shocking discovery.
He finds plans for a time machine and a letter from his granddad, challenging him to embark on an adventure of a lifetime.
Tommy sets out on a quest to complete the family tree his granddad had started, but his journey is fraught with danger - especially when a prehistoric creature tags along for the ride.
Will Tommy succeed, or will he erase his family from history altogether?
Join Tommy on his travels to find out...
Published: 24 May 2012
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