AbeBooks: Double Trouble: Twins in Literature: "To novelists, twins can be very bad, very misunderstood, very mysterious and sometimes badly mistreated. In fact, it would be fair to argue that twins get a bad rap from most writers.
One thing is clear - twins are never dull in literature. Audrey Niffenegger, Wally Lamb, Pat Conroy, Arundhati Roy, V.C. Andrews and Madeleine L’Engle are just a few of the authors to have turned to twins."