In the introduction Smith engages with the novelist Julian Barnes book, Nothing to be frightened of, that expresses his anxieties about dying and death. It looks like a fascinating book that has received wide praise from readers with a diversity of perspectives.
Here I just give one quote that Smith used:
If I called myself and atheist at twenty, and an agnostic at fifty and sixty, it isn't because I have acquired more knowledge in the meantime: just more awareness of ignorance. How can we be sure that we know enough to know? As twenty-first-century neo-Darwinian materialists, convinced that the meaning and mechanism of life have only been fully clear since the year 1959, we hold ourselves categorically wiser than those credulous knee-benders who, a speck of time away, believed in divine purpose, an ordered world, resurrection and a Last Judgment. But although we are more informed, we are no more evolved, and certainly no more intelligent than them. What convinces us that out knowledge is so final?