Several names have already been announced for the event, including Amanda Foreman, whose biography of Georgiana, Duchess of Devonshire, was recently transformed into a feature film starring Keira Knightley.
The festival has grown each year since it was launched in 2004 and last year attracted record crowds.
In an announcement on Althorp’s website, a spokesman for the historic home said: "Alastair Campbell’s take on power and politics is always fascinating but it is his debut novel, All in the Mind, that will be featured here, a book described by Stephen Fry as a ‘devastating penetration of the human mind’.
"The fascinating Amanda Foreman talks about her mesmerising biography of Georgiana, Duchess of Devonshire.
"Historian Antony Beevor’s studies of 20th century conflicts are legendary. At Althorp this year he will be delivering insights into his latest work, D-Day: the Battle for Normandy."
When Amanda Foreman’s novel was adapted for the big screen as The Duchess, the author was keen to downplay marketing which compared the story of Georgiana, Duchess of Devonshire to that of Diana, Princess of Wales, who grew up at Althorp.
Campbell’s first novel has been described by its publisher, Random House, as "the compelling story of a psychiatrist, his patients and family, and the pressures they bring to bear upon each other".
Last year, top names – including broadcaster John Humphries, comedian Julian Clary and General Sir Mike Jackson – were at the festival, which was listed among the best by The Independent.
This year it takes place from Friday, June 12, until Sunday, June 14. To register for a programme and email updates, call Northampton 770107.
Source : Northampton Chronicle and Echo