Absolutely fascinating and at least somewhat thought-provoking - but definitely not for everyone. There's part of me that's inclined to recommend this to folks who liked THE TIME TRAVELER'S WIFE (one of my favorites), but I concede it's not nearly as ambitious. At various points, the book is extremely tense and dramatic, while at others it is immensely sad (nay, heart-breaking). But, throughout, I found it compelling, engaging, and, ultimately, entertaining. It's a short book - a quick read - that's well worth the limited investment.