Ours is not to reason why, ours is but to do and die. but it is not duty to empire that fuels Earl Dumarest, shuttling him from planet to planet as he searches for Earth. it is nostalgia. and such a strange nostalgia! for a place he barely recalls, no doubt barren and impoverished, a place he once fled from. why does the longing for return so control him, forcing him to leave welcoming places and loving companions behind? (besides the author's need to write a 31-volume series, of course.) in Web of Sand, Earl muses that this quest is the entirety of his identity. without it, he would be nothing. it is his religion, his ultimate goal, his entire reason for being.
In the valley of Death rode Earl of Dumarest. the valley this time is the world Harque, desert planet of sand storms and giant armored reptiles, an oligarchy and a kleptocracy and a plutocracy, all at once. a typically dire planet in this universe of dire humans and their excruciatingly finite ambitions. stasis is what this planet's rulers have achieved and what they plan to keep. fortunately for Earl, his time in this place will only last 156 pages (the length of this book).
Web of Sand includes an especially compelling scene: while listening to a "singing jewel" whose dirge transports its listeners to a place of despair, a jealous singer responds with her own terrible song, her vibrating notes shattering glass and rupturing eardrums, destroying the jewel, killing its owner. you don't hear those kinds of songs every day!