Solar by Ian McEwan
Michael Beard is a Nobel prize-winning physicist whose best work is behind him. A compulsive womaniser, Beard finds his fifth marriage floundering. But this time it is different: his wife is having the affair, and he is still in love with her. When Beard's professional and personal worlds collide in a freak accident, an opportunity presents itself for Beard to extricate himself from his marital mess, reinvigorate his career and save the world from environmental disaster.