The chapters in this book combine to show that it is exceedingly improbable to the point of refutation for the god of Orthodox Theism to exist. The main problem is an evidential one regarding horrendous suffering. A perfectly good god would be opposed to it, an all-powerful god would be capable of eliminating it, and an all-knowing god would know what to do about it. The existence of horrendous suffering in the world leads us to think that god is either not powerful enough to eliminate it, or does not care enough to eliminate it, or is just not smart enough to know what to do about it.
The book also addresses issues relating to the lack of objective evidence for miracles, the absurdity of theistic myths, the relationship of horrendous suffering to differing theologies and religious faiths, the horrendous nature of the biblical god, the horrendous actions done because of religious faith, and how these considerations can lead reasonable people away from religion.
The authors discuss these issues philosophically, theologically, apologetically, biblically, religiously, historically, and personally. It's an excellent model for how philosophers, apologists, and theologians should've been discussing this problem decades ago.