I do like Le Carre's Smiley books. They made wonderful screen adaptations too. The ones starring Alec Guiness are superb and still available on DVD, e.g. this from Amazon.co.uk http://www.amazon.co.uk/Tinker-Tailo...4742070&sr=1-4
This US version looks very expensive http://www.amazon.com/Tinker-Tailor-...4742155&sr=1-2
It would be worthwhile for Americans to buy it from the UK and tweak the DVD player to play Region 2 stuff.