It seems that this novel from Matt Haig has struck a chord in New Zealand, it has outsold his previous books here by quite a bit. That said, it's a hard book to describe without risking putting people off, as the subject seems so unlikely, but it's worth reading regardless, as Matt Haig is so good at making the unlikely meaningful. The book explores what it would be like if we could live our life having undone the things we regret, and it's not always as straightforward as we might think. In the end, he is asking what is the best way to live? An effortlessly readable book about the big themes in life, and a worthy addition to Matt Haig's catalogue.