This week's competition, in which you have to identify a book from its opening sentence, is from a non-fiction work by a science-fiction master:
"The story of our world is a story that is still very imperfectly known."
* Entries, including postal address, should be sent to First Impressions, The Times Higher, Admiral House, 66-68 East Smithfield, London E1W 1BX, faxed to 020 7782 3300 or e-mailed to email@example.com
The winner receives a £25 book voucher. The closing date is June 19.
The winner of last week's competition, who identified Vatsyayana's Kamasutra (translated by Wendy Doniger and Sudhir Kakar), was Ben Crabstick of New College, Oxford.
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