Time Bomb — Nigel Hinton

I've never told this story to anyone because when I was twelve
I swore an oath in blood that I would never tell it. But the friends I swore
it with are dead now, so it's time to break that oath and tell the truth…

One summer changes everything. The summer of 1949 Andy and his three best friends discover an unexploded bomb buried in the Big Brown Hill. On that hill, beside the bomb, the foursome vow to keep their discovery a secretâ€"a sin of omission that has the gravest of consequences.

This explosive story of boyhood camaraderie, set in postwar London, follows four friends as they confront issues of racism, loyalty, morality, and mortality, that have set their country, their community, and their lives ablaze.