Which book by J.K. Rowling, initially published under the pseudonym Robert Galbraith, marks the beginning of a series of detective novels?

The Cuckoo's Calling

By adopting the pseudonym of Robert Galbraith for "The Cuckoo's Calling", J.K. Rowling surprised the literary world, showcasing her versatility as a writer. This novel introduces Cormoran Strike, a private detective scarred by life, immersing readers in a complex and captivating investigation. The success of this first book led to a series that has firmly established itself in the detective genre. The true identity of the author was revealed shortly after the book's publication, garnering significant media attention and bolstering its success.