I posted last year about a couple of Apps for Martina Cole and Mark Billingham and I keep seeing one for Alexander McCall Smith being advertised on posters at train stations:
This is Alexander McCall Smith's official iPhone app. It features exclusive video of the author discussing key characters in the series and locations throughout the country of Botswana. You can also read sample chapters from the books in the No. 1 Ladies' Detective Agency series, including an exclusive preview chapter from The Saturday Big Tent Wedding Party. And find out about 20 of Alexander's favourite songs. Look out for further updates this year.
(taken from AppShopper)