I have to admit, I quite like the Splinter Cell novels for the most part (with the exception of Endgame...).
With that being said, does anyone know if there are any plans to write more Splinter Cell novels in the future? There's plenty of story opportunities out there!
If they ever got another author to write them, I'd definitely vouch for James Swallow. (He wrote several Star Trek books, and the (supposedly) good Deus Ex novel: Human Revolution).