The Portable Atheist

The Portable Atheist: Essential Readings for the Nonbeliever (2007) is an anthology of atheist and agnostic thought edited by Christopher Hitchens. 
Going back to the early Greeks, Hitchens introduces selected essays of past and present philosophers, scientists, and other thinkers such as Lucretius, Benedict de Spinoza, Charles Darwin, Karl Marx, Mark Twain, George Eliot, Bertrand Russell, Emma Goldman, H. L. Mencken, Albert Einstein, Daniel Dennett, Sam Harris, Victor J. Stenger and Richard Dawkins − with original pieces by Salman Rushdie, Ian McEwan, and Ayaan Hirsi Ali. 
For Hitchens, "religion invents a problem where none exists by describing the wicked as also made in "the image of god and the sexually nonconformist as existing in a state of incurable mortal sin that can incidentally cause floods and earthquakes." "The only position that leaves me with no cognitive dissonance is atheism. Death is certain ... Life on this earth, with all its mystery and beauty and pain, is then to be lived far more intensely: we stumble and get up, we are sad, confident, insecure, feel loneliness and joy and love. There is nothing more; but I want nothing more."
Hitchens dedicated the anthology to the memory of Primo Levi and prefaces the book with quotes from Levi's "If This Is a Man" and "The Drowned and the Saved".
Overview.
For Hitchens, arguments for atheism can be divided into two main categories: those that dispute the existence of God and those that demonstrate the ill effects of religion. "Religion", he defines, "is, after all, more than the belief in a supreme being. It is the cult of that supreme being and the belief that his or her wishes have been made known or can be determined." He mentions great critics such as Thomas Jefferson and Thomas Paine, who perhaps paradoxically regarded religion as an insult to God.
"An agnostic does not believe in god, or disbelieve in him", writes Hitchens. Non-belief is not quite unbelief, he explains. "One is continually told, as an unbeliever", he writes, "that it is old-fashioned to rail against the primitive stupidities and cruelties of religion because after all, in these enlightened times, the old superstitions have died away. Nine times out of ten, one will be told not of some dogma of religious certitude but of some instance of charitable or humanitarian work undertaken by a religious person. Of course, this says nothing about the belief system involved." Hitchens points out that if Louis Farrakhan's Nation of Islam (NoI) succeeds in weaning young black men off narcotics, this would not alter the fact that the NoI is a racist crackpot organization. He reminds readers that Hamas – which publishes "The Protocols of the Learned Elders of Zion" on its website – won a reputation for its provision of social services. He challenges: which ethical statement made or which action performed by a believer could not have been made or performed by a non-believer?