1 The cosmos and the microworld
2 Our cosmic habitat I: planets, stars and life
3 The large number N: gravity in the cosmos
4 Stars, the periodic table, and ε
5 Our cosmic habitat II: beyond our galaxy
6 The fine-tuned expansion: dark matter and Ω
7 The number λ: is cosmic expansion slowing or speeding?
8 Primordial ‘ripples’: the number Q
9 Our cosmic habitat III: what lies beyond our horizon?
10 Three dimensions (and more)