Simon Lewis has been a human and a vampire, and now he is becoming a Shadowhunter. But the events of City of Heavenly Fire left him stripped of his memories, and Simon isn’t sure who he is anymore. He knows he was friends with Clary, and that he convinced the total goddess Isabelle Lightwood to go out with him…but he doesn’t know how. And when Clary and Isabelle look at him, expecting him to be a man he doesn’t remember…Simon can’t take it. So when the Shadowhunter Academy reopens, Simon throws himself into this new world of demon-hunting, determined to find himself again. His new self. Whomever this new Simon might be. But the Academy is a Shadowhunter institution, which means it has some problems. Like the fact that non-Shadowhunter students have to live in the basement. And that differences—like being a former vampire—are greatly looked down upon. At least Simon is trained in weaponry—even if it’s only from hours of playing D&D. Join Simon on his journey to become a Shadowhunter, and learn about the Academy’s illustrious history along the way, through guest lecturers such as Jace Herondale, Tessa Gray, and Magnus Bane. These ten short stories give an epilogue to the Mortal Instruments series and provide glimpses of what’s in store in the Dark Artifices.

An inheritance of shadows. A love in chains. An unconquerable foe. Cordelia Carstairs is a Shadowhunter, a warrior trained since childhood to battle demons. When her father is accused of a terrible crime, she and her brother travel to London in hopes of preventing the family’s ruin. Cordelia’s mother wants to marry her off, but Cordelia is determined to be a hero rather than a bride. Soon Cordelia encounters childhood friends James and Lucie Herondale and is drawn into their world of glittering ballrooms, secret assignations, and supernatural salons, where vampires and warlocks mingle with mermaids and magicians. All the while, she must hide her secret love for James, who is sworn to marry someone else. But Cordelia’s new life is blown apart when a shocking series of demon attacks devastate London. These monsters are nothing like those Shadowhunters have fought before—these demons walk in daylight, strike down the unwary with incurable poison, and seem impossible to kill. London is immediately quarantined. Trapped in the city, Cordelia's friends discover that a dark legacy has gifted them with incredible powers—and forced a brutal choice that will reveal the true cruel price of being a hero.

When seventeen-year-old Bailey starts a new job at a hotel waterpark, she is less than thrilled to see an old acquaintance is one of her coworkers. Bailey met Charlie a year ago on the long flight to Omaha, where she moved after her parents’ divorce. Charlie’s cynicism didn’t mix well with Bailey’s carefully well-behaved temperament, and his endless commentary was the irritating cherry on top of an already emotionally fraught trip. Now, Bailey and Charlie are still polar opposites, but instead of everything about him rubbing Bailey the wrong way, she starts to look forward to hanging out and gossiping about the waterpark guests and their coworkers—particularly two who keep flirting with each other. Bailey and Charlie make a bet on whether or not the cozy pair will actually get together. Charlie insists that members of the opposite sex can’t just be friends, and Bailey is determined to prove him wrong. Bailey and Charlie keep close track of the romantic progress of others while Charlie works to deflect the growing feelings he’s developed for Bailey. Terrified to lose her if his crush becomes known, what doesn’t help his agenda is Bailey and Charlie “fake dating” in order to disrupt the annoying pleasantries between Bailey’s mom and her mom’s new boyfriend. Soon, what Charlie was hoping to avoid becomes a reality as Bailey starts to see him as not only a friend she can rely on in the midst of family drama—but someone who makes her hands shake and heart race. But Charlie has a secret—a secret that involves Bailey and another bet Charlie may have made. Can the two make a real go of things…or has Charlie’s secret doomed them before they could start?