Farewell Rebus

In a New York Times article, Ian Rankin's latest John Rebus novel Exit Music is referred to as a milestone. And it's with a very simple reason: this latest Rebus novel marks the end of the series according to Rankin. Although, (not having read the book myself) who knows? After all, unless Rebus dies in this book, there's always a possibility of return. And even "death" didn't stop Sherlock Holmes from returning.