God: The Failed Hypothesis is a 2007 New York Times bestseller by scientist Victor J. Stenger who argues that there is no evidence for the existence of a deity and that God's existence, while not impossible, is improbable. David Ludden of Skeptic magazine wrote that "Stenger lays out the evidence from cosmology, particle physics and quantum mechanics showing that the universe appears exactly as it should if there is no creator." Ludden concluded "All freethinkers should have both volumes [The God Delusion and God: The Failed Hypothesis], side by side, on their bookshelves."