Publishers&rsquo catalogues these days are stuffed with diasporic stories roving reporters with mid-western twangs and hennaed hands searching for a postmodern twist to the old arranged marriage tale, earnest graduates from the home counties seeking to exorcise their bangla bhooths. Bharati Mukherjee, Chitra Banerjee Divakaruni, Jhumpa Lahiri and a herd of others leap to mind &mdash and leap out again, like so many springbok. Writers such as Amitav Ghosh and V.S. Naipaul weigh in on the other end of the scale hard acts to follow.