Jeff Zaleski gave this novel a mixed review for Publishers Weekly: "Jensen is on surer ground describing Kabbalah and Holocaust history than she is plotting supernatural adventures, which unravel by the end.

[4] Kirkus Reviews was also somewhat mixed in their summary, describing the novel as "intriguing and often surprising, but what with a plot that doesn't add up and (with one exception) a nasty bunch of characters: mostly a tough slog".

[5] Marian Kester Coombs in her review for Human Events was much more positive, saying, "the writing is felicitous--sometimes humorously colloquial, sometimes Virginia-Woolfish in the subtlety of its aperçus--and the momentum is energetic throughout (too often such heady plots lose steam and end up chugging wearily into the station for the obligatory finale).

[6] Fiona Kelleghan gave the novel a rave review in The Washington Post, saying that Jensen writes "confidently and enthrallingly" and that the novel "deserves to take its place...in a Hugo nomination line-up": "Babe scientist Jill Talcott and her delightful lab assistant Nate stumble onto an equation with literally world-shaking implications, and their unexpected alliance with a playboy tabloid journalist and an Orthodox rabbi endangers all four and their murderous Department of Defense pursuer.

Anyone who was tempted to hurl Dan Brown's wooden and overhyped The Da Vinci Code across the room might want to give this book a try; if you're looking for a well-written thriller full of religious symbology and exciting action, this is the real thing".