You may be looking for the Find Your Fate novel.

The Empire of the Wolf was an empire the Lupine Wavelength Haemovariform, with the help of its worshippers, the Brethren, planned to begin upon biting Queen Victoria. Using the trap of the light chamber Sir Robert MacLeish's father and Prince Albert worked on in conjection with the Koh-i-Noor, the Tenth Doctor "drowned" the werewolf in moonlight, supposedly preventing its bite from reaching the British Royal Family. (TV: Tooth and Claw)

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