Whether you’re sunbathing by the sea on a beach holiday, sipping a coffee in a café on a city vacation, or burrowing into your sleeping bag on a camping adventure, there’s one thing every trip needs: a good book. In among your reading list you may have some popular-science books, but how well do you know some of the classics from the genre? Below we’ve listed the first sentence of the first chapter (not the preface or introduction, and not including opening quotes) of some of our physics favourites – see if you can connect the line with the book in the jumbled list, and keep an eye out for the answers on the Physics World website. Have fun and happy holidaying!