If you ever get the chance to rent or buy SHARPE'S CHALLENGE on DVD, by all means take it! The story is a combination of all the adventures from SHARPE'S TIGER, SHARPE'S TRIUMPH, and SHARPE'S FORTRESS, plus they throw in a lot more romance and more interesting female characters who aren't in any of the novels.
Unfortunately, this last volume (FORTRESS) is probably the least interesting of the three India books. It's not that there's anything wrong with it, it's just that the ending is rather anticlimactic after all the buildup in the two earlier books. Sharpe and Dodd finally come face to face, but their showdown isn't nearly as exciting as it is in the movie. Sharpe runs into Sergeant Hakeswill, again, but the whole thing of Obadiah being beaten over and over and thrown to tigers, elephants, snakes, etc. is becoming almost pointless and silly by this time. Can't take Obadiah seriously as a villain if he keeps coming back from the dead. Says so in scriptures!
The one thing that really irritates me about these Sharpe books, as opposed to the TV movies, is the way women are portrayed. Sharpe's love interest in the last book betrays him and runs off the moment his back is turned -- because all pretty women are whores and thieves, doncha know. And then he has a new girl, and they have sex after knowing each other for about three days, and then at the end he passes her along to a buddy of his. Because Sharpe is so generous, and women are really just property to be given other men as proof of Sharpe's nobility, doncha know. The funny thing is, if you watch the movie SHARPE'S CHALLENGE, they add an English girl to the story, a colonel's daughter, and even though she's drop dead gorgeous and in love with Sharpe she's also portrayed as brave, determined, and conscientious. It's not that hard to create attractive women with strong personalities and compelling motivations. It's a basic part of storytelling. Women are just as interesting as men if you know how to write them correctly, Mr. Cornwell.
Says so in scriptures!