World of Warcraft. Before the Storm - Christie Golden

An all-new, official prequel novel to The Battle for Azeroth, Blizzard Entertainment's next expansion to the critically acclaimed World of Warcraft videogame.
In Before the Storm, Anduin Wrynn, king of Stormwind, and Sylvanas Windrunner, warchief of the Horde, are new to their positions of power, both ascending before they were truly prepared. As the Alliance and the Horde struggle to recover from the devastating war with the demonic Burning Legion, a terrible discovery will test both leaders, threatening to reignite the bitter enmity between their factions and shake the very foundations of the world of Azeroth.