There is freedom in this life and there is power, and I was ambitious for the latter. [p. 15]
Kamet is a slave, albeit an expensive and efficient one: he is secretary to Nahuseresh, the erstwhile Medean ambassador to Attolia. Disgraced by the failure of the mission to Attolia the year before, Nahuseresh has returned to court in Ianna-Ir, hoping for a new post. Unfortunately his latest request has not been granted -- and the court is a dangerous place for a man out of favour. Fearing that he'll be blamed for Nahuseresh's death by poison, Kamet accepts the help of an Attolian soldier who's promised him his freedom. Together, they flee across the desert, the Attolian constantly lauding his king, Kamet feeling effortlessly superior. But the two are becoming friends, despite the secret Kamet can't admit.
This is very much a road-trip story. It's told as Kamet's first-person narrative, and there is a great deal he does not know. (I am unclear, though, why he refers to his companion as 'the Attolian' despite knowing his name from early on.) He's convinced of his own value, and of the barbarity of Attolia. To entertain his presumed-illiterate companion, he recites his own verse translations of the old myths of Immakuk and Ennikar, who are reminiscent of Gilgamesh and Enkidu. And he finds himself thinking differently about loyalty, freedom, power and friendship.
Not my favourite of the series, not least because the protagonists of the main arc don't appear until late in the novel: but Kamet's growth as a person, and the echoes of myth in his friendship with the Attolian, are engaging, and the various secrets -- some hidden in plain sight, others only evident in the final chapters -- are cleverly hidden and revealed. (Kamet's poor eyesight, from years of reading in bad light, is a plot point.) And it's nice to see Medes other than the oily Nahuseresh, who's been portrayed as a dyed-in-the-wool villain (the novel opens with Kamet having suffered a beating for 'overreaching') but had, it seems, some redeeming qualities.