Clockwork Princess - Cassandra Clare That was perfect. Thank you Cassandra Clare for writing the perfect ending to a series. I am always nervous reading the last book in a series. I am worried it will not end how I want it to and going into Clockwork Princess I was especially nervous. But I should not have worried. I loved how it ended. It has re-lit the flame of loving the universe that is the shadowhunters. After the last "mortal instruments" book I was sad that the series excitement was dying for me, but now I am excited again and curious to see how it all plays out.