that have been adapted for TV recently: The White Queen by Philippa Gregory (currently televised on the BBC, Sunday nights) has gone down to 99p. My Mad, Fat Teenage Diary by Rae Earl (was televised by Channel 4 earlier this year) is now £1.99. The Poison Tree by Erin Kelly (ITV, late in 2012) is now £1.99 too.
I am very pleased because they have all been on my wishlist for ages, and rightly or wrongly I don't let myself pay 'proper' book prices for downloads. Whether this saves me money in the long run is debatable, though, I have so much on my Kindle.