The Emperor Reborn.

Hi.
I have been reading some Star Wars books now, and often hear about a reborn Emperor or a clone of the Emperor who turned Luke to the Dark side. But I have had no luck in finding that book, or are there more then one? What is it called and who have written it? Is it any good?
Hope someone can give me an answer.

Cheers.

soooooo....
The story you speak of, is not a book but a graphic novel, well 3 actualy.
The Dark Empire series.
The story is from Tom Veich and the drawing's from Cam Kennedy.
I personnaly liked it but some people disagree with me. I guess you'll have to read it and see for yourself.

Ok.
So its a comic then?
That will be hard to get here in Norway. Anyone know if it is on the net anywhere?

I got the first Dark empire book, and thought it was quite good, but not excellent