Cook has been running the company since the late '90s. I'd say he's a pretty well-known by now. Ruthlessly competent operations chief, who saved Apple from operational incompetence (by the "Adult Supervision" who fired Jobs in the first place), and probably the biggest reason why the iPod, iPhone, and iPad are successes - by giving Apple the capability to design (through operating capital), market and produce them, and make a margin on every unit they sell.
Apple being a black box due to secrecy, it's hard to tell what's going on inside, but by all we have seen, it's been pretty confident at doing what it feels it's good at. I doubt there's a "Jobs haunting" mentality there. But hey, if Yukari Kane wants to sell books...