The Darksmith Legacy

The Darksmith Legacy is a ten book series featuring the Tenth Doctor and published by BBC Children's Books.

The series
This ten-book series follows the Doctor on his exciting journey to discover the origins of the so-called Eternity Crystal and the powerful artisans who created it - the Darksmiths. The books have interactive elements, readers having the options to go to the tie-in website to add points to a tally of points accumulated so as to access further additional content.

Features
Apart from the fiction, the books have TARDIS Data Banks containing more information and activity pages designed to tie in with the websites. Additionally, the books have cut-out or downloadable coupons entitling readers to an invitation to a party in London, provided they had completed the challenges.

Each book ends in a cliffhanger leading on to the next segment of the storyline.