This book follows Nora, a woman who is depressed and living a life where everything seems to have gone wrong at once. After making a decision years ago, she is on bad terms with the last family member she has left and nothing else seems to be given right. She is given the opportunity to explore her regrets and possible differences it would have made in her life. 

This book was so good. I really enjoyed exploring the different scenarios and how one action, big or small affected the outcome of her life. It challenges how we define success and happiness, and how the smallest interactions with the people around us can completely change our lives and theirs. 

I am not sure that any book is absolutely flawless, but I can't really think of any major downsides to this book.