Clockwork Prince is a 2011 novel written by Cassandra Clare. It is the second novel in The Infernal Devices trilogy and is written through the perspective of the protagonist, Tessa Gray, who lives at the London Institute among Shadowhunters, a group of half-angel/half-human beings called Nephilim. After the recent failings of Charlotte, the head of the London Institute, the Council of Shadowhunters begin to question her ability to lead. Now Tessa and her friends must find Mortmain – an evil industrialist bent on destroying all the Nephilim in the world – or risk losing control of the Institute. The book also contains many quotes referring to famous pieces of Victorian literature, for example, Alfred Tennyson's The Palace of Art, Charles Dickens' A Tale of Two Cities, and the works of Samuel Taylor Coleridge. A sequel to Clockwork Prince, titled Clockwork Princess, was released on March 19, 2013. Source: Wikipedia (en)