I've been waiting so patiently for Head Rush since finishing Double Cross. The wait was definitely worth it. I won't indulge on the details of the story without giving things away but I will say that I will never think of Gumby as a meaningless little soft clay creature again! Also, this is one of my favorite UF series! I'm in awe of the creativity & uniqueness of the world that Carolyn Crane has envisioned. I highly recommend this trilogy to anyone looking for a UF that is different & refreshing. And I hope there will be many books by this author in the future!