I really enjoyed this book and have liked reading Jack McDevitt's stuff since i discovered Engines of God at my local Library.

If i have one criticisim of the book like in a movie (and with a minor spoiler) as soon as Plan B was mooted as a "Just in Case" the main plan was unsuccessful you knew that it was going to be used. In saying that the way that it was used was very clever and in the style of a movie reviewer a "Thrill ride"

I would recommend it and am looking forward to reading the other books in the Engines of God series.