Gordon Brown is to go into print with a follow-up volume to his book on heroes, it was announced today.

The chancellor, now promoting himself to Labour MPs, party members and trade unions in the leadership contest, will bring out a book on Britain's Unsung Heroes.

It will complement his tome from earlier this year on political heroes, entitled Courage: Eight Portraits.

The Guardian part-serialised that series of biographical essays.

The work will tell the stories of ordinary people whose commitment to a community or cause has either informed or inspired Mr Brown.

No details are available about the individuals who will be featured in it but Mr Brown said it was about "the kind of heroes we might each aspire to be".

Speaking about the new book, he said: "This is the story of unsung heroes in our communities, every day performing extraordinary acts of courage, generosity and humanity to help their neighbours, improve their neighbourhoods and change lives for the better.

"The kind of heroes we might each aspire to be. The kind of heroes who are the very foundation of the good society we aspire to create."

Unsung Heroes will be published on July 24 by Mainstream Publishing and all royalties will go to the charity Community Links, which runs community-based projects in east London.

Mr Brown has already written several books for the Edinburgh-based Mainstream Publishing, including one on the late Labour leader John Smith.

While a student at Edinburgh University he worked on the student newspaper with Bill Campbell, who went on to found the publishing firm along with Peter MacKenzie, another friend of Mr Brown.

In 1986 he published a book on the firebrand Labour leader James Maxton - the subject of Mr Brown's Phd.