He also wrote the international bestseller Calendar : Humanity 's epic struggle to determine a true and accurate year ( Avon ) , published in 20 languages .
Duncan 's previous books include Masterminds : Genius , DNA and the Quest to Rewrite Life .
Duncan also wrote the international bestseller Calendar : Humanity 's epic struggle to determine a true and accurate year ( Avon ) , published in 20 languages .
Duncan 's previous books include Masterminds : Genius , DNA and the Quest to Rewrite Life .