Omnibus hardcovers

Each book contains a map of the known world inside the front cover and a map of the city inside the back cover.
Covers for all four are by Walter Velez, the same artist who did many of the paperbacks of individual books. There was and is a spirited argument in fandom over who the three figures on the cover represent. One figure is clearly a Blue Star adept, so is assumed to be Lythande. The black-haired figure is often thought to be Hanse, though in some covers she is clearly female. The third figure has less consensus, though it's occasionally thought to be Kadakithis traveling incognito.
Jill Bauman, Velez' agent since 1978, explains "Yes, it's true when Walter was asked to do the covers the books weren't written yet. It was a concept. He was given descriptions of the time period, the type of costumes, and some characters which he would invent. Once the first book cover was done, he had to follow up with the others."
Sanctuary (1982)
* Publisher ‏ : ‎ Science Fiction Book Club; First Edition (January 1, 1982)
* Cover art by Walter Velez
Cross-Currents (1984)
* Publisher ‏ : ‎ Nelson Doubleday; Book Club Edition (January 1, 1984)
* Cover art by Walter Velez
The Shattered Sphere (1986)
* Publisher ‏ : ‎ Nelson Doubleday; 1st edition (January 1, 1986)
* Cover art by Walter Velez
The Price of Victory (1989)
* Publisher ‏ : ‎ Guilld America Books/The Berkley Publishing Group; Book Club (BCE/BOMC) edition (January 1, 1989)
* Cover Art by Walter Velez