HarperCollins is proud to present its new range of best-loved, essential classics.

'The physicist transforming how we see the universe' (Financial Times)'An utter joy' (Adam Rutherford)'A hugely engaging book... Rovelli is a charming, thought-provoking tour guide' (Manjit Kumar Prospect)Do space and time truly exist? What is reality made of? Can we understand its deep texture?Scientist Carlo Rovelli has spent his whole life exploring these questions and pushing the boundaries of what we know. In this mind-expanding book, he shows how our understanding of reality has changed...

Why are we here? What's the point of existence? For those who are unsatisfied by the answers of traditional religion, and equally by the lack of answers from atheism, Philip Goff opens up a path between the two. He argues for cosmic purpose: the idea that the universe is directed towards certain goals, such as the emergence of intelligent life.

Alice could be anyone - she could be someone you know, or someone you love - and Alice is in trouble ... Being fifteen is hard, but Alice seems fine. But the big difference between Alice and a lot of other kids on drugs is that Alice kept a diary .

**NEW YORK TIMES BESTSELLER**Why do human beings behave as they do?

This is a revised edition of "The Penguin Atlas of Medieval History".