A Scandal in Battersea (Paperback) [Lackey, Mercedes]

The twelfth novel in Mercedes Lackey's magical Elemental Masters series reimagines Sherlock Holmes in a richly-detailed alternate 20th-century England

Christmas is a very special time of year. ‚   It is special for Psychic Nan Killian and Medium Sarah Lyon-White and their ward Suki, who are determined to celebrate it properly. ‚   It is special for their friends, Doctor John Watson, and his wife Mary, both Elemental Masters, who have found great delight in the season seeing it through young Suki's eyes. ‚   ‚  
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It is also special to others...for very different reasons.
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For Christmas Eve is also hallowed to dark forces, powers older than mankind, powers that come awake on this long, cold night. ‚   Powers best left alone. ‚   Powers that could shake the foundations of London and beyond.
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It begins slowly. ‚   Women disappearing in the dark of night, women only missed by those of their own kind. ‚   The whispers only begin when they start to reappear "because when they do, they are no longer sane. ‚   And when Nan and Sarah and the Watsons are called on to examine these victims, they discover that it was no ordinary horror of the streets that drove them mad.
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But then, the shadows reach for other victims "girls of good, even exalted families, who vanish from concerts, lectures, and evening balls. ‚   And it will take the combined forces of Magic, Psychic Powers, and the world's greatest detective to stop the darkness before it can conquer all.