Nick Hornby's second bestselling novel is about sex, manliness and fatherhood. Will is thirty-six, comfortable and child-free. And he's discovered a brilliant new way of meeting women - through single-parent groups. Marcus is twelve and a little bit nerdish: he's got the kind of mother who made him listen to Joni Mitchell rather than Nirvana. Perhaps they can help each other out a little bit, and both can start to act their age.