Do you know what your "number" is? It's the amount you need for your nest egg. Have you saved enough? Can you save enough? <I>The Number</i> offers an intriguing and entertaining tour -- of wealth gurus, life coaches, and financial advisers, and our hopes and fears for the future -- to explore the secrets of the Number. The result is a provocative field guide to your psyche and finances, and an urgently useful book for anyone over thirty. <I>The Number</i> will help you think about the kind of life you want, and the kind of help you need to achieve it.