In my opinion, Solar was not one of McEwan's best work. While readable, I felt it was more of a character sketch of a loathsome man, made buffoonish to the point where you still have a bit of feeling for him. However, by the end of the book I was anticipating his demise -- almost hoping he would die -- so perhaps not buffoonish enough.
I found Bear's Hull Zero Three more interesting and thought provoking. He does an amazing job of keeping you in the dark while moving along the action, doling out information in small parcels that keep you wanting more. It's not a casual read, and yet I devoured it in about 3 days because I couldn't set it down. Now I appear to be bookless for the next few minutes, but I'm certain I'll pick something up and start reading before the day is out.