“I regret that we have reluctantly come to the conclusion that we could not publish it with commercial success,” reads a letter from then-independent publisher Constable & Robinson.

The Cuckoo’s Calling, the first in a series, was eventually picked up by Little, Brown and Company’s Mulholland Books and published in 2013. The series is set to be adapted for BBC One.

After her initial message the Twitter-happy author responded to a fan asking about tenacity:

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