There is a reference to them in the Laundry Files book series [1]. [1] https://www.goodreads.com/series/50764-laundry-files https://www.goodreads.com/series/50

There is a reference to them in the Laundry Files book series [1]. [1] https://www.goodreads.com/series/50764-laundry-files https://www.goodreads.com/series/50764-laundry-files