Excellent as ever. McEwan has a fantastic lightness of touch - you feel like you are in very safe hands from the first word.
I really enjoyed the character of Michael Beard, the fat, bumbling, possibly brilliant physicist whose very physical failings eventually prevent him from making a revolutionary break-through in climate science. Mainly - but not solely - through Beard, McEwan suggests that mankind's inability to tackle global warming is rooted in our own selfish desires and appetites.
The scene in the boot locker of the boat near Spitzbergen, when Beard struggles to get ready on time, is a favourite. But generally, McEwan's prose is so rich with subtle observation, and humour, that there is never a dull moment.