Not to Be Taken is a 1938 mystery detective novel by the British writer Anthony Berkeley.

It was one of several stand-alone novels he wrote alongside his series featuring the private detective Roger Sheringham.

It was published in the United States with the alternative title A Puzzle in Poison.

[2] In the small English village of Anneypenney, the death of the squire John Waterhouse is at first taken to be natural.

However, his brother suspects murder and demands the body is exhumed and it is revealed he died from arsenic poisoning.