There isn't a central character in the books and He left for parts umknown with Dujek's Host in the Bonehunters.

Yeah, I know that's the official stance, but he was the very first character we met back in chapter one of Gardens of the Moon. It just kind of felt like his story would eventually emerge as the main character/hero/protagonist of the story.

I hope he makes a huge entrance and stand in The Crippled God!