OK, so it might be a while till the next ES game, but this is the next best thing. There's new heroes and new bad guys with new stories and agendas, but all written into the existing Elder Scrolls world you know and undoubtedly love (if you're anything like me).
This story (which is the first of a two-parter, I can barely wait for the next one) is set in Cyrodiil, the land featured in Oblivion. No doubt you've figured out that the hulking floating island on the cover has something to do with it, and you'd be right. It's a bizarre place, and author Greg Keyes helps bring it to life, along with loads of other Tamrielic locales. You'll be chuffed, trust me.
It's hard for me to rate this impartially because I'm such a slobbering fanboy, hence the 4-star rating, which allows for some fanatacism. However, to me the book was a 5-star read and if you love the games like I do, you'll probably adore this book too.