Interview with Grayling here. From the article:
… Grayling is almost certainly going to upset a lot of Christians, for what he has written is a secular bible. The Good Book mirrors the Bible in both form and language, and is, as its author says, “ambitious and hubristic – a distillation of the best that has been thought and said by people who’ve really experienced life, and thought about it”. Drawing on classical secular texts from east and west, Grayling has “done just what the Bible makers did with the sacred texts”, reworking them into a “great treasury of insight and consolation and inspiration and uplift and understanding in the great non-religious traditions of the world”. He has been working on his opus for several decades, and the result is an extravagantly erudite manifesto for rational thought.