Archangel's legion was even better than the previous books of the series. While Raphael and Elena has always had a steamy relationship, Nalini Singh really outdid herself in the intimate scenes and managed to flesh out those character even more.
Another conflict is evident with the members of the Cadre and Raphael and Elena must plan for war while forgotten elements of Elena's past and her father's are brought to light. It helped Elena gain some closure with her daddy issues while providing interesting back story.
I especially liked that the 7 were not just window dressing but really participated to the story and I'm eternally hoping for Bluebell's book.