JK Rowling goes fourth as she announces crime novel is finished

JK Rowling (PA)

JK Rowling has finished her latest novel – and announced the news to fans on the internet.

Earlier this week the writer revealed she was “very close” to finishing Lethal White – the fourth novel in her Cormoran Strike series – and that it will be adapted for screen.

It follows the adventures of private investigator Cormoran Strike and is written by Rowling under the pseudonym Robert Galbraith.

“Finished,” the Edinburgh-based author simply wrote on Twitter next to “#LethalWhite”.

It received nearly 14,500 likes by followers.

Lethal White follows the previous Strike books The Cuckoo’s Calling, Silkworm and Career Of Evil.

All three have been adapted into a BBC series, with the conclusion of the third mystery airing earlier this month and leaving fans wanting more.

There were concerns about whether Lethal White would ever be ready, after Rowling revealed ideas about Harry Potter spin-off film series Fantastic Beasts were driving her to distraction.

Rowling is the richest author in the world and the ninth-best-selling fiction writer of all time.

As well as the Potter franchise she has written a number of other books.