Magnus Bane and Alec Lightwood are settling into domestic life with their son Max when the warlocks Ragnor Fell and Shinyun Jung break into their loft and steal a powerful spell book.
With the help of Clary Fairchild, Jace Herondale, Isabelle Lightwood, and Simon Lovelace (who is fresh from the Shadowhunter Academy), they track the warlocks to Shanghai.
Book 2 in The Eldest Curses seriesThe Eldest CursesThe Lost Book of the White.
Realizing that Ragnor and Shinyun are being controlled by a more sinister force, Magnus and Alec set out to stop them and recover the Book before they can cause any more harm.
Magnus Bane and Alec Lightwood are settling into domestic life with their son Max when the warlocks Ragnor Fell and Shinyun Jung break into their loft and steal a powerful spell book