๐ธ๐ธ๐ธ๐ธ out of 5 ๐ธs This is a fascinating book, and exceptionally readable. The characters are utterly human, a fact that not only adds to but propels the story. An intriguing exploration of the motives that drive us all, the book centers around the ultimate "what if." What if we could glimpse the alternate realities in which we might live? I absolutely recommend this book.