This week's competition, in which you have to identify a book from its opening sentence, is from a book about decipherment:
"The urge to discover secrets is deeply ingrained in human nature; even the least curious mind is roused by the promise of sharing knowledge withheld from others."
* 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 emailed to email@example.com
The closing date is October 31. Nobody identified last week's book, The Lucky Country by Donald Horne, so next week's prize is doubled to £50.
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