Several lore books can be found throughout the Forbidden Reach, the Dracthyr starting zone!
Warning: Dragonflight Alpha Spoilers Ahead
In the very first section of the dracthyr starting area, the War Creche, five edicts can be found lining the wars. Each edict offers insight into dracthyr history and lore.
Edict: The Earth-Warder is a message from Neltharion himself.