I just love all the world building that goes into every floor in the tower the climbers manage to climb to, and this time round our friends are climbing to floor 60, that of Nightmare City where all the criminals, fugitives and rogue climbers dwell. This city is run by criminal gangs all wanting to gain more power and they do this by threatening and putting fear into one another. However an auction is to be held in the city and a folder holding secrets from the past is to be auctioned. The rogue climber better known as the scarlet demon, the same one who nearly killed Max in the tournament, and who happens to be Elle, the young sister he has been on the look out for will no doubt be bidding for this as will Nicolas Adler, the person who had killed their parents. Max climbed to floor 60 with Casey, Toto and Tiberius and they got into trouble as soon as they exited into the city. From thereon they were earmarked by the gangs who were all set to make their life hell. However a member of the Faceless Association took them under her wing, but nothing gets done for free in Nightmare City. Max had a new ability which he took from Elle through his mimic ability but he now had to learn how to use his new break mode powers. Zack the drunk who lived in the junkyard was the one to teach him. They also needed to make as much money as they could prior to the auction as the competitors were richer than they were . All Max wanted was to get close to his sister and to persuade her to come home, but Elle and her friends Kai and Winifred of the Fallen Angels would have none of this. A gang war was triggered and a mass murderer known as the butcher was on the loose and our trio were in for all sorts of edge of the seat adventures. I love that Max never loses hope and keeps striving to gain his sister's trust even at the risk to his own life once again. He is now being called the God Killer and his ingenuity and perseverance are what see them through so many of their ordeals. Max is a true hero, young but full of ideals which he strives to maintain in the face of so much evil. I am also enjoying the romance which is gently unfolding between Max and Casey, they make a perfect team and I am really looking forward to the next book in this very thrilling series!