The Dark Artifices
The Dark Artifices is a trilogy written by Cassandra Clare. The series is chronologically the fourth series in The Shadowhunter Chronicles and a sequel to The Mortal Instruments. It is set in Los Angeles. The series consists of three books: Lady Midnight, Lord of Shadows and Queen of Air and Darkness, in that particular order. Centered around the protagonist, Emma Carstairs, the series follows her journey as a Shadowhunter at the Los Angeles Institute, and her life with her best-friend and parabatai, Julian Blackthorn, and his family. The series is about a sacred bond of "parabatai", two bonded Shadowhunters, and it is more valuable than any bond in this world. This bond makes the two more powerful and strong, but there is only one drawback - it is forbidden to fall in love with your parabatai. It so happens that Emma and Julian, two parabatai, have fallen in love. The Dark Artifices is a trilogy about their struggle against their enemies and how the two protagonists deal with their forbidden love and the resulting consequences. The series is told from the point-of-view of the various different characters in the story.
Read more or edit on Wikipedia