When I read a book, I write a little review on Goodreads and I give it some categories, just to help me find it more easily later, or collect together with books that cover similar themes, and The Anniversary fits into so many, and that's what's interesting about this book. Genre-defying, subject-defying - once I was prepared to just go with it, I really enjoyed it. JB is a successful writer up for a big prize. She's been married for a long time to Patrick - a successful screenwriter and film director much older than her. For a long time they've helped each other with their work, but they've recently been drifting away from each other and so JB persuades Patrick to go on a cruise with her to celebrate their anniversary. But in the middle of a storm, Patrick falls overboard. JB continues to Japan, and then back to the UK and then to America to collect her prize, and then to Australia and finally back to the UK where Patrick's death is questioned. Is this a murder mystery? No, but almost. A literary thriller? Well, definitely literary. A courtroom drama? A little bit. A family drama?All those things and more. It's a slow unravelling of a marriage by an unreliable narrator, stopping on the way to think about art and artists and writers. I really enjoyed it.