The Domino Effect 
BBC 8th Doctor book

By: David Bishop
When:February 2003 (UK)
The Doctor arrives in a 2003 unlike any they expected. The British Empire is flourishing, terrorism is rife, and, strangest of all, the computer hasn't been invented. This is no accident of time - someone is deliberately manipulating the Earth's history but why? The Doctor has to find out before the excruciating pressure causes time itself to collapse.

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