In 'Lethal White,' the fourth book in the Cormoran Strike series, the titular detective finds himself embroiled in a complex case when a mentally troubled young man named Billy seeks his help. Billy is haunted by a childhood memory of a crime but is unable to recall specific details. His claims, however, resonate with a certain truth that compels Strike and his partner, Robin Ellacott, to investigate. Their search takes them through a labyrinth of London's backstreets, into the secretive corridors of Parliament, and out to a grand yet unsettling manor in the countryside. Amidst the tangled investigation, Strike grapples with the complications of fame and his evolving relationship with Robin. With each twist and turn, 'Lethal White' weaves a suspenseful narrative that tests the limits of its protagonists, both professionally and personally.