Murder In Maastricht by Graham Brack
My rating: 4 of 5 stars

Master Mercurius is in Maastricht to partake in a debate on witchcraft, when one of the witnesses is killed. Found inside the locked library and the key in the inside lock. Mercurius investigates.
An entertaining and well-written historical mystery with its likeable main character. Another good addition to this enjoyable series.

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