Clockwork Angel By Cassandra Clare Published by Walker Books ISBN 978 1 4063 3034 2 Cassandra Clare, author of the best-selling Mortal Instruments trilogy, knows she is onto a good thing; she has now made the clever move of penning a prequel series to the three novels. Clockwork Angel is a thrill-a-minute, self-contained novel that will have readers panting for more. The mixture of romance, horror and magic from the previous books is the same, but the time and place has changed from modern New York to late 19th-century London. On the death of her aunt, Tessa Gray, 16, crosses the Atlantic to Victorian London to live with her brother. She has hardly stepped off the boat before a pair of sinister old women called the Dark Sisters kidnap her. Tessa thinks they are taking her to her brother's home, but she is dead wrong. The Dark Sisters know something about Tessa that she does not know herself: the young American has the potential to become a Shape Shifter. The Sisters keep Tessa captive while teaching her to exploit her ability to change into other people, dead or alive. Mrs Dark and Mrs Black work for the Magister, the leader of the Downworlders, ancient vampires and warlocks who stalk the shadowy streets of Victorian London. Tessa discovers that the Dark Sisters plan for her to marry the Magister. Tessa is rescued from the Dark Sisters by a mysterious young man who is one of the Shadowhunters, a secretive breed of half-angel Londoners intent on destroying the powers of the Downworlders. The stage is set for a classic showdown between good and evil. Clockwork Angel is a persuasive piece of Gothic fiction that leaves the coffin lid wide open for the next adventure.