I think this is a good attempt at a forensically slow but enthralling book. My problem with it is that no body is as good as the actor who played the role in the BBC TV series. It may be unfair to compare a two hour film to a (roughly) six hour series but every now and then I dropped out of this thinking 'the other guy' was better.
Definitely agree with this. I enjoyed the film, but the series is better (I own them both - plus the BBC's follow-up to TTSS, Smiley's People). And that's an interesting point about it seeming more like a 'historical drama', which the series obviously didn't suffer from at all.