JK Rowling will publish her second crime novel this summer, with her private detective, Cormoran Strike, on the trail of a killer who bumps off a novelist.

The Harry Potter creator was unmasked last year when it emerged she had secretly published a thriller called The Cuckoo's Calling under the pseudonym Robert Galbraith.

Her new novel, The Silkworm is due to be published on June 19 and sees Strike and his assistant, Robin Ellacott, unravelling the death of writer Owen Quine after first being called in to probe his disappearance.