For a storyline,... THE ASSYRIAN by Nicholas Guild
Takes place in 600BC, if you like history, very good read, although a fictional plot many accurate historical events and gives you a good perspective of those days.
For Psychology,.... THE 48 LAWS OF POWER by Robert Greene
Brilliant, stoic like philosophy. Shows you how to conduct yourself with class, dignity and how to keep the edge on your side.
For manuscript and ancient text,... The book of Jasher and the book of Enoch
Some crazy battles in Jasher, very detailed accounts of Mesopotamia, Egypt, and Ethiopia. Story of The Watchers in Enoch - Fallen angels that procreated with human woman.