various
The Omnissiah's Chosen

From the haunted jungles of the Dolorosa Coil to the badlands of a Chaos-corrupted forge world, the forces of the Adeptus Mechanicus wage war in five short stories that showcase the soldiers of the Machine God.
Warhammer 40k
collection

It contains:
Clade
The Enigma of Flesh
The Zheng Cipher
Vanguard
Infinite Circuit

Also in:
Eleven Tech Priests A Tinkering