Chronicles of the Argon War is quest item received as reward for finishing quest One Father's Legacy. It gives background lore about the First Argon War and roles of Elleon, Fraya, Kaidun, Hasmina and Syona in it. It also mentions creation of Valkyon Federation and general Catharnach who was key person in it.
It mentions that Amena Quatla was "lost city", sealed away by powerful magic, until revealed to outside world. This also revealed Sikander, who was in deep slumber and allowed Thulsa and Killian to exploit him.
Events described in book took place while player character was noob patrolling Arcadia.