I Don't Know How She Does It by Allison Pearson
I bought this after discovering that its author is a fellow member of Clare College, Cambridge; this is the top fiction book by a Clare graduate on LibraryThing which is not by China Miéville (though Nick Harkaway and Peter Ackroyd are not far behind). It's a story of a woman in a City job being driven crazy by the competing demands of work and family, and was made into a widely panned movie starring Sarah Jessica Parker and Pierce Brosnan which shifts the setting to New York so as not to confuse people who haven't heard of London. I have to say I don't think this is a terrific example of chick-lit - you can see from a fairly early stage which way the plot is likely to go, and it duly does so. If I venture into this genre again I shall probably give Freya North another go instead.