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image captionRichard Osman is writing two follow-ups to The Thursday Murder Club
Pointless co-host Richard Osman's debut novel The Thursday Murder Club was the UK's best-selling book in the last full week before Christmas.
The murder mystery sold 134,500 copies in the week up to Saturday.
That's more than double the next biggest seller - Barack Obama's memoir A Promised Land, which sold 66,500.
David Walliams, who has been at number one for three of the past four Christmases, is at number three with Code Name Bananas, on 55,000 sales.
Osman's book had the highest sales for a Christmas number one since Jamie Oliver a decade ago, according to The Bookseller, and is the first debut novel to be Christmas number one since current records began in the late 1990s.