I enjoyed the end of this series. I'm not sure I really bought completely into Simon's defeat of the triad - why it worked, that is. Be that as it may, everything else seemed to fit. I'm not sure I would consider this Liam and Cormac's story since Simon is a huge focus of this one still, though the sex primarily follow those two. It worked well enough though. 
 The epilogue was nice. Perhaps there may be a spin-off with Riley in the future.