Good intentions do not a good novel make, which is probably why so many books in this genre are just bad literature in a banshee wail. Once in a while, a writer like Anita Desai, or Anjana Appachana, or Manju Kapur transforms the uniformly drab landscape of a difficult marriage with a blend of insight and acute wit. These are authors who understand (as Vikram Seth and even Amit Chaudhuri do, if you’re wondering about the absence of writers with a Y chromosome) that the apparently narrow span of the wedding band can be a gateway to a variety of landscapes, as vast and strife-ridden as a battlefield, as intimately revealing as a travel diary.