In this installment of Bookmark we spend some time with Nadine O’Regan, who is the Books and Arts Editor with The Sunday Business Post and presents Songs in the Key of Life on Dublin station TXFM (www.txfm.ie and 105.2FM) on Saturdays from 11am. Photos by Mark Earley. Jeffrey Eugenides- Middlesex  American author Jeffrey Eugenides writes novels incredibly slowly – he has published just three in his 55 years and for Middlesex, his 2002 novel which won the Pulitzer Prize, his American editor had to fly to Berlin, where Eugenides was living at the time, to wrest the manuscript from his grasp. Luckily…