Book one of The Circuit series, Executor Rising, did a good job of setting the stage for the rest of the story. The main characters are all established, their backgrounds and motivations are mostly clear, and the state of the solar system is such that the impending conflict will have dire consequences depending on how it all turns out. However, none of the factions can be classified as the good guys in this story so I do not find myself emotionally invested in any particular outcome, or character. Normally that is an issue for me, but in this case I found myself eager to know how it turns out anyway.
Progeny of Vale - the war has begun.