Diamond Solitaire by Peter Lovesey

In this gripping mystery, the once-disgraced detective Peter Diamond finds himself embroiled in a complex case that begins with the discovery of a mute Japanese girl in a London department store. As Diamond delves deeper into the investigation, he uncovers a web of international intrigue involving pharmaceutical companies, corporate espionage, and the Yakuza. With his characteristic wit and tenacity, Diamond navigates through a series of twists and turns, determined to protect the vulnerable child and unravel the truth behind her mysterious appearance, all while confronting his own personal demons.