Clockwork angel. Cassandra Clare. 2010.

When sixteen-year-old Tessa Gray arrives in England during the reign of Queen Victoria, something terrifying is waiting for her in London’s Downworld, where vampires, warlocks and other supernatural folk stalk the gaslit streets. Friendless and hunted, Tessa seeks refuge with the Shadowhunters, a band of warriors dedicating to ridding the world of demons. Drawn ever deeper into their world, she finds herself fascinated by - and torn between - two best friends and quickly realises that love may be the most dangerous magic of all.