Clockwork Princess
A net of shadows begins to tighten around the Shadowhunters of the London Institute. Mortmain plans to use his Infernal Devices, an army of pitiless automatons, to destroy the Shadowhunters. He needs only one last item to complete his plan: he needs Tessa Gray.
Charlotte Branwell, head of the London Institute, is desperate to find Mortmain before he strikes. But when Mortmain abducts Tessa, the boys who lay equal claim to her heart, Jem and Will, will do anything to save her. For though Tessa and Jem are now engaged, Will is as much in love with her as ever.
As those who love Tessa rally to rescue her from Mortmain’s clutches, Tessa realizes that the only person who can save her is herself. But can a single girl, even one who can command the power of angels, face down an entire army?
Danger and betrayal, secrets and enchantment, and the tangled threads of love and loss intertwine as the Shadowhunters are pushed to the very brink of destruction in the breathtaking conclusion to the Infernal Devices trilogy.
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Cassandra Clare
Cassandra Clare is the name behind some of the most beloved and thrilling fantasy novels of the 21st century. Her Shadowhunter Chronicles—a series set in a shadowy, magical world where demons, angels, and other creatures lurk just beneath the surface of our own—has captured the hearts of readers worldwide. Known for her immersive world-building, complex characters, and heart-pounding action, Clare's books are a portal to a universe where danger and romance intertwine, and where the stakes are always life or death.
The Infernal Devices
There are three books in the Infernal Devices series: Clockwork Angel, Clockwork Prince, and Clockwork Princess. The Infernal Devices are often called a prequel series to the Mortal Instruments, but only because they take place in an earlier time period and contain some of the Mortal Instruments’ characters’ ancestors. You don’t have to read the Mortal Instruments before The Infernal Devices. You don’t have to read the The Infernal Devices before The Mortal Instruments. You can read them in any order.
The Infernal Devices consists of three books. The current recommended reading order for the series is provided below.
Main series Shadowhunters
Reviews and Comments
I loved especially this last book of The Infernal Devices Trilogy, it's charmingly old-fashioned style, sweetly sad Victorian Brittish atmosphere; rainy gloomy and foggy gray London. This is the best book of Clare which I have read thus far. The whole trilogy is interesting and the world-building captivating, better than the following The Mortal Instruments Series, to which this is a prequel. This trilogy tells the history and background of the Shadowhunter Families, and includes a few of the same minor characters, the most important of them being the charming and mysterious Warlock Magnus Bane. I cannot but help to recommed this book and the whole trilogy to all the lovers of historical fantasy.

