This was a worthy sequel, though much more character (rather than conceptual) driven than Spin; Axis sort of reads like the LOST version of the Spin universe. It's actually somewhat refreshing exploring the Spin world with mostly fresh set of characters, and therefore a fresh set if eyes, but these new people aren't nearly as deep it interesting as from the first novel, despite being the focus. At times the plot becomes a little repetitive, and at these points you're carried along more by the desire to just get to the point rather than intrigue, but at other points it's really captivating in the ideas that Wilson puts forward (ie. What is life? What is a mind and at what point do we define true emotion it decision?). Good, fast read and Im looking forward to the final book in the trilogy.