The Life Of Lee was released just over a week ago, on so-called Super Thursday when a glut of pre-Christmas titles are released.
It means the Sunday Times bestseller list is now dominated by comedians, who take five of the top six slots, proving that the comic memoir remains a lucrative genre for publishers.
At number two in the list is James Cordenís biography, May I Have Your Attention, Please, which sold more than 12,000 copies in its first week, and at number 3 is the official companion to ITVís Downton Abbey.
Kayís Book Thatís More Than Just A Book Book sold another 5,700 copies last week - bringing its total sales to a shade under 17,000, and placing it No 4 in the list.
Itís followed by Pam Ayresís biography The Necessary Aptitude and Alan Partridgeís I, Partridge: We Need To Talk About Alan, which sold just under 5,000 copies in its first week.
And in the paperback chart, Karl Pilkingtonís An Idiot Abroad retains the No1 slot.
Click here to buy Life Of Lee.