Cassandra Clare

As mysterious murders threaten the new peace between Shadowhunters and Downworlders, only Simon, the Daylighter vampire, can help bring both groups together.

When sixteen-year-old orphan Tessa Fell's older brother suddenly vanishes, her search for him leads her into Victorian-era London's dangerous supernatural underworld, and when she discovers that she herself is a Downworlder, she must learn to trust the demon-killing Shadowhunters if she ever wants to learn to control her powers and find her brother.

"Cordelia Carstairs has lost everything that matters to her. In only a few short weeks, she has seen her father murdered, her plans to become parabatai with her best friend, Lucie, destroyed, and her marriage to James Herondale crumble before her eyes. Even worse, she is now bound to an ancient demon, Lilith, stripping her of her power as a Shadowhunter. After fleeing to Paris with Matthew Fairchild, Cordelia hopes to forget her sorrows in the city's...

Cordelia Carstairs, a Shadowhunter trained to battle demons, travels with her brother to London where they reconnect with childhood friends but soon must face devastating demon attacks in the quarantined city.

Magnus Bane and Alec Lightwood must recover a book stolen by warlocks Ragnor Fell and Shinyun Jung, who are being controlled by a Greater Demon.

Now entering his final year at the Magisterium, Callum Hunt feels more unwelcome than ever, estranged even from his former friends, and hounded by the furtive darkness of Constantine's evil soul--in fact, as he approaches his greatest challenge, the only "person" he can count on is Aaron, whom he raised from the dead, and whose consciousness is currently residing in Callum's brain.

Continues the adventures of Call and his friends in the Magisterium.