Which pseudonym did J.K. Rowling use when publishing the crime novel The Cuckoo's Calling?

J.K. Rowling used the pseudonym Robert Galbraith when publishing the crime novel The Cuckoo’s Calling.

The novel appeared in 2013 and introduced private detective Cormoran Strike and his temporary secretary, Robin Ellacott. At first, the author was publicly presented as Robert Galbraith, described in publisher material as a former military police investigator.

The pseudonym was later revealed to be Rowling’s. The disclosure attracted major media attention because the novel had initially been published without her well-known name on the cover. Rowling continued the series under the Galbraith name rather than replacing it with her own.

The Cormoran Strike books form a separate crime-fiction series from Harry Potter. Later novels include The Silkworm, Career of Evil, Lethal White, Troubled Blood, The Ink Black Heart, and The Running Grave. Television adaptations use the title Strike.