In 1944, a bomb destroyed a South London woolworths. Among the 168 who died, the author has imagined 5 young children's lives at 15-year intervals until 2009. The life that might have been for each one is absorbing as we follow their various highs + lows + in parts is very moving. The book ends with a reminder not to dwell on paths not taken, and I put it down wishing there was more and wiping away moisture from my eye.