The Mad King Rises is the fourth chapter of Dawnbringers, an epic series of books driving forward the narrative of Warhammer Age of Sigmar. You’ll find loads of riveting background material detailing the further expeditions of and lethal challenges facing the Twin-Tailed Crusade and its mortal champions as the servants of Nagash plot against them.
Inside this 96-page hardback book you’ll find:

An exciting narrative that details the perilous journey of the Twin-Tailed Crusade, along with Battleplans, and updated Triumph and Treachery rules that allow you to play battles involving three to four players.
Warscrolls for Sekhar, Fang of Nulahmia, and Ushoran, Mortarch of Delusion.
A new Path to Glory chapter for the Twin-Tailed Crusade campaign.
Rules for a new Army of Renownthe Scions of Nulahmiaas well as for 6 new Regiments of Renown.