Here are a few books that I enjoyed:
The Moral Arc: How Science and Reason Lead Humanity toward Truth, Justice, and Freedom by Michael Shermer - In this provocative and compelling book, Shermer will explain how abstract reasoning, rationality, empiricism, skepticism—scientific ways of thinking—have profoundly changed the way we perceive morality and, indeed, move us ever closer to a more just world.
Everybody Is Wrong About God by James A. Lindsay - A call to action to address people’s psychological and social motives for a belief in God, rather than debate the existence of God.
Letter to a Christian Nation by Sam Harris - In response to The End of Faith, Sam Harris received thousands of letters from Christians excoriating him for not believing in God. Letter to A Christian Nation is his reply. Using rational argument, Harris offers a measured refutation of the beliefs that form the core of fundamentalist Christianity. In the course of his argument, he addresses current topics ranging from intelligent design and stem-cell research to the connections between religion and violence.
The Bonobo and the Atheist: In Search of Humanism Among the Primates by Frans de Waal - In this lively and illuminating discussion of his landmark research, esteemed primatologist Frans de Waal argues that human morality is not imposed from above but instead comes from within. Moral behavior does not begin and end with religion but is in fact a product of evolution.