Overall, the Force Unleashed novelizations are decent. They expand on the game's plot and characters, giving more depth. However, they might not live up to everyone's expectations, depending on personal preferences.
They use conflict. In an 'unleashed romance novel', the conflict can be internal, like the characters' own fears about love, or external, such as family or society not approving of their relationship. This conflict drives the story forward and makes the resolution more satisfying when the characters overcome it. For example, if a couple is from different social classes, the external pressure from society can create a lot of drama and tension in the story.
Sorry, I don't know the precise cancellation date. Maybe it was cancelled because of financial reasons or a shift in the target audience. Try doing a search on popular entertainment websites for the accurate information.