Frank Gruber

Oliver Quade, the Human Encyclopedia

2014

Wanted

1991

The whispering master

1994

The Silver Tombstone

1995

The curly wolf

1983

Quantrell's Raiders

1994

Fighting Man

2021

Bushwhackers

1994

Broken Lance

1989

Bitter Sage

1991

Town Tamer

1992

The Spanish prisoner

1992

The Silver Jackass

1994

The Lone Gunhawk

1983

The honest dealer

1989

The gold gap

1994

The Etruscan Bull

1989

The Dawn Riders

1982