LONDON — Karen Joy Fowler and Joshua Ferris are among five Americans who have made it onto the longlist of the Man Booker Prize, which for the first time is open to writers from beyond Britain, Ireland and the Commonwealth.

The longlist, which also has six books written by Britons, was announced on Wednesday by the administrators of the prize. The other Americans nominated are Siri Hustvedt, Richard Powers and Joseph O’Neill, an Irish-born writer now living in New York.

The eclectic list of 13 novels ranges from experimental, literary high-wire acts to more commercial fare, like works by the best-selling authors David Nicholls and Ms. Fowler.

The decision to include all authors, “whether from Chicago, Sheffield or Shanghai” rankled some purists when it was announced last September; until last year, the 50,000 pound, or roughly $85,000, prize was restricted to authors from Britain, the other countries in the Commonwealth, and Ireland and Zimbabwe for books originally written in English and published in Britain.