What pseudonym did J.K. Rowling use for The Silkworm?

J.K. Rowling used the pseudonym Robert Galbraith for The Silkworm.

The Silkworm is the second novel in Rowling’s Cormoran Strike detective series. It was published in 2014 under the Robert Galbraith name, following The Cuckoo’s Calling, which introduced private investigator Cormoran Strike and his assistant Robin Ellacott.

The pseudonym was intended to let Rowling publish a crime series without the immediate expectations attached to her name. Her identity as Galbraith was revealed in 2013, after The Cuckoo’s Calling had initially been published anonymously under the pen name. The revelation led to substantial attention for the series.

The title The Silkworm refers to a controversial manuscript at the center of the investigation. Robert Galbraith is a shared literary identity for the series, but Rowling is its author. The name should not be confused with a separate writer or with a character in the novels.