Prussian Blue is a 1947 mystery crime novel by the British writer Anne Hocking.

[1] [2] It was her ninth in the series featuring Chief Superintendent William Austen of Scotland Yard.

It was published in the United States by Doubleday under the alternative title The Finishing Touch.

[3] Celebrated British painter Anthony Medway is found dead in his studio on the island of Cyprus.

MacDonald secures leave from military duty in Cairo to travel to Cyprus to assist the local police.