The God argument - Professor A. C. Grayling

There has been a bad-tempered quarrel between defenders and critics of
religion in recent years. Both sides have expressed themselves
acerbically because there is a very great deal at stake in the debate.
This book thoroughly and calmly examines all the arguments and
associated considerations offered in support of religious belief, and
does so in full consciousness of the reasons people have for subscribing
to religion, and the needs they seek to satisfy by doing so. And
because it takes account of all the issues, its solutions carry great
weight. The God Argument is the definitive examination
of the issue, and a statement of the humanist outlook that recommends
itself as the ethics of the genuinely reflective person.