The Song Before It's Sung

I've just read The Song Before It Is Sung: A Novel - my first Justin Cartwright. It's a novel based on the friendship - and then severed relations - between Adam von Trott, who was one of the conspirators hoping to kill Hitler, and Isaiah Berlin.

It was interesting, but somehow it didn't work. I felt Cartwright was wrestling with the material and had invented a structure that in the end didn't work. But at the same time it has made me want to read other books he has written as I gather this was not his best. Nobody can always write at their best - or maybe never.