The world-famous cosmologist and #1 bestselling author of A Brief History of Time leaves us with his final thoughts on the universe's biggest questions in this brilliant posthumous work.

'RIDICULOUS, DELIGHTFUL AND, DAMN IT, EDUCATIONAL' Sunday Times, Books of the Year. Welcome to the world's most entertaining and useless self-help guide, from the brilliant mind behind the wildly popular webcomic xkcd and the million-selling What If? and Thing Explainer