Mark Whitaker receives an envelope 8 years after his wife Rebecca died in a car accident. It's addressed in his own writing, yet he has no recall of having written it. Inside is a note including the simple message, "You can save her."
The angels transport Mark back in time to before his wife died. He is anxious to make changes to the timeline, but doing so would mess up his future self and probably cause some paradox. The paradox would feed the Angels. While Mark wants to save Rebecca, The Doctor and his companions are trying to save him and the world from the Weeping Angels.
The plot centers around Mark Whitaker with limited involvement from the Doctor and his companions. The Doctor, Amy, and Rory mostly do brief stints of time travel appearing at key points in Mark's timeline as outlined in the letter, to thwart the angels.
The Doctor, Amy, and Rory act true to their characters. I especially enjoyed the Doctor. He is a little more fleshed out than Amy and Rory. The plot is fast paced leaping from one point on the timeline to the next with little downtime for the characters in the telling. The book still manages to tell how Mark manages to survive in his past.
Overall it's a good book. The characters are true to form. It would enhance your experience if you are familiar with this cast of the Eleventh Doctor. I still give the book 4 stars for the portrayal of all including the Angels and for the action.
Disclaimer: I received a copy of this book in exchange for my honest opinion.