It is a practical and reality check book. It makes you realise that for an average lifetime you only have about 4000 weeks to live and leaves you with a physical feeling of how short that actually is. The book does not have the answers how to live whatever you have left of your potentially 4000 weeks. But provide guidelines how to think about the rest of your time. And that there will never be enough time. There is probably nothing revolutionary in the message. But it is very practical to make one think about the finite time we have left.