The eighth book in Jeff Kinney's Diary of a Wimpy Kid series, Hard Luck (Puffin), will have a UK first printing of 800,000 copies.
The run for Hard Luck, due for publication on 6th November, is Penguin's biggest-ever first printing of a children's book.
The publisher also said Jeff Kinney's series as a whole will surpass 115m books in print by that publication date.
Francesca Dow, m.d. for Penguin Children's, said: "Diary of a Wimpy Kid has been making children laugh and enticing even the most reluctant readers to read for over five years now in the UK. We are very proud that it has become one of the world's bestselling series of all time. Our new book in November, Diary of a Wimpy Kid: Hard Luck, is set to be another great milestone for this incredibly popular and original superbrand."
The campaign for Hard Luck will include national TV and national rail advertising, as well as online consumer and nationwide schools and libraries promotions. Kinney will be visiting the UK in December for publicity including "large scale 1,000-seater live events" as well as national radio and TV. Puffin has launched A Wimpy Kid Lottery giving schools the chance to win a visit from the author.
Nielsen BookScan has recorded UK sales of 5,909,228 copies of the Kinney books, to a value of £32,689,568.