I love the transition in shapes and depth in all these shots, it has a great abstract feel. From 1-4 the frame becomes increasingly filled, losing space and definition between foreground, mid-ground, and background. The last shot blows me away, but only as part of the series; as the final picture I'd expect some sort of conclusion, yet it's just these ads and posters (a shift in content as well), and I guess you could refer to it as a statement of sorts though I wouldn't want to get too specific about it.
Damn fine work Helen, I really love these.