From amazon.com:

"The end of the story in the hugely popular game The Force Unleashed left the Star Wars galaxy poised at the brink of civil war. But before that can happen, the Emperor and his apprentice, Darth Vader, have another plan already in play. The author of the original game, Haden Blackman, returns with a new story of treachery, deception, and the manipulation of the overwhelming power of the Force. Omar Francia, from Star Wars: Legacy and Mass Effect, is back, providing the amazing art for this original graphic novel based on the upcoming LucasArts game.

Product Description
The end of the story in the hugely popular game The Force Unleashed left the Star Wars galaxy poised at the brink of civil war. But before that can happen, the Emperor and his apprentice, Darth Vader, have another plan already in play.
The author of the original game, Haden Blackman, returns with a new story of treachery, deception, and the manipulation of the overwhelming power of the Force. Omar Francia, from Star Wars: Legacy and Mass Effect, is back, providing the amazing art for this original graphic novel based on the LucasArts game!
• The first volume of Star Wars: The Force Unleashed sold over 80,000 copies!
• Not merely an adaptation of the events in the game, this graphic novel expands on the story!

Product Details
Series: Star Wars
Paperback: 88 pages
Publisher: Dark Horse; First Edition edition (October 12, 2010)
Language: English
ISBN-10: 1595825533
ISBN-13: 978-1595825537
Product Dimensions: 0.2 x 6.4 x 9.8 inches
Shipping Weight: 10.6 ounces
Average Customer Review: 3.3 out of 5 stars (14 customer reviews)"

I haven't played the game, but whereas in the first one I thought I was able to pick where the boss battles would be, it is blatantly obvious where they are here, and they waste far too much time on them. The storyline is quite good though, and should be fleshed out with more detail.