Were I to tell you what the "difficult subject" is, I might spoil your reading experience, as the author doesn't introduce the topic immediately in this standout first novel. But I can tell you that you'll find in this book a warm and insightful treatment of an intelligent young woman, her coming of age in London, and her sometimes painful, but always interesting and unusual relationship with someone important in her life. I found myself caring a great deal about the characters and their challenging situation. Ms. Berkeley writes with style, humor, wisdom, and heart. A great read!