• 1. Introduction; 2. Early Philosophy: Absolute Simplicity; 3. Middle Philosophy (1929–1933): Relative Simplicity; 4. Later Philosophy: Fluid Simplicity (1937–1951).

'Brimming with ideas from, and analyses of, Wittgenstein's philosophy of mathematics, the book contains both material of interest for those new to the topic, as well as often subtle and novel interpretations aimed at experts … A rich and sophisticated take on an intricate topic, Floyd's book is to be warmly recommended to all those eager to deepen their understanding of Wittgenstein's philosophy of mathematics.' Sorin Bangu, Philosophia Mathematica