The Mortal Instruments
"The Eldest Curses" is the fourth set of books all to be published. The trilogy tells the story of Magnus Bane and Alec Lightwood's adventures together and explore their relationship. Each book is set at different points in the franchise's timeline: the first is set during the events of "The Mortal Instruments"; the second is set between the events of "The Mortal Instruments" and "The Dark Artifices"; and the last will be set after "The Dark Artifices". The books were jointly written by Cassandra Clare and Wesley Chu.