Ciaphas Cain was created in 000.
First in the series is "For the Emperor". First full-size book chronologically is "Death or Glory." There are some short stories in there, too, mostly before "Death or Glory"
Toasting Cain was created in 2004.
Cain's Offering was created in 2009.
Cain's Book was created in 1960.
The Ghost of Cain was created in 1986.
Cain Dingle was created in 2000.
Commander Cain was created in 1978.
Cain - novel - was created in 2009.
The Daughters of Cain was created in 1996.
Cain - band - was created in 2006.
The Descendants of Cain was created in 1954.
Cain's Blood was created in 1995-02.