The Cuckoo's Calling is the first book in the Cormoran Strike series, written by Robert Galbraith (pseudonym of J.K. Rowling). It follows private detective Cormoran Strike as he investigates the supposed suicide of a supermodel. As Strike delves deeper into the case, he uncovers a web of secrets and lies. This book is a masterful blend of crime, mystery, and character development, keeping readers hooked until the very end.