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A frustrating experience indeed, and as you will see next time, it can even be a traumatic experience. :)

Have you read any of the Charlie Stross books about a secret government department that deals with the occult? I've read a couple and enjoyed them.

http://www.antipope.org/charlie/blog-static/2016/04/faq-the-laundry-filesseries-ti.html

No, I haven't, but I read a lot, so I'll put them in the queue :)