Chevalier Coqdor and Robin Muscat, the head of Interplan, the interplanetary police force of the Martervenux confederation, thought they were finished with the mysterious Zodiac organization which had displayed such strange and mysterious powers. They believed they had unlocked their awesome secret, older than mankind itself.

And yet, from Paris-sur-Terre to the catacombs of Aquarius, the battle begins anew, and once more, the Zodiac puts the universe in deadly danger. It will take the extraordinary perseverance of the celebrated Star Knight and the fearless commissioner of Interplan to finally unveil the true, ultimate mystery behind the Zodiac...

Between 1960 and 1987, Maurice Limat (1914-2002) penned 50-odd novels depicting the epic story of a human race that left its native Earth, allied itself with its neighbors from Mars and Venus, and has set out to discover the galaxy, proudly taking its place alongside the natives of Altair, Perseus, and thousands more worlds.

Like Star Trek creator Gene Roddenberry's Federation, to which Limat's universe bears a strong resemblance, the stellar odyssey of the Terrans from the Martervenux is, above all, peaceful, and turned towards the discovery of the Other. Conflicts, when they arise, are resolved with the author's characteristic humanism through his hero, Chevalier Coqdor. The Coqdor novels celebrate the power of love and tolerance, and a genuine belief in God, something unusual in science fiction.

This book collects an original novel by Limat from 1969 and its sequel, written in 2006.