Billy Collins, Jonathan Franzen, Moses Isegawa, Pico Iyer, Geert Mak, Marilynne Robinson, Roxana Robinson, Salman Rushdie, Gary Shteyngart, Janne Teller, and Colson Whitehead read from relevant works of fiction at the event Green Thoughts: Writers on the Environment, part of the 2007 PEN World Voices Festival.