Kaleidoscope Century John Barnes

Joshua Ali Quare lives life to the full - decades before, he was infected with a virus that ensures that for every fifteen years he lives, he gains another ten. After each virus induced coma, he wakes with his memory erased and ten years younger. This time round, in 2109, someone is looking for him and it is time to put the record straight once and for all; doing so takes us through a century of gripping future history.