Following King Azoun IV's crusade against the Tuigan Horde in the Year of the Turret, 1360 DR, Koja was a guest of Azoun, living in Suzail in Cormyr for over a year. While there, on the king's request, he wrote up an account of his experiences with the Tuigan and their culture. He was aided in this by Thom Reaverson, who worked on a similar project and provided Koja with translations and guidance.
The finished work was entitled Life among the Tuigan and gave an accurate and unbiased account of his experiences with the Tuigan people and the Horde. Despite Koja's skills as a military historian, the Life said little about how the Tuigan breached the Dragonwall, suggesting that magic was used. Koja dismissed it as an incomplete collection of notes about Tuigan customs, and felt that Reaverson put in an equal amount of work. He began work expanding his notes into A History of the Tuigan.