Cover art
Kilian, Crawford. Rogue Emperor. Ballantine/Del Rey 1988.

Kilian, Crawford. The Chronoplane Wars
Comments: Series containing The Fall of the Republic, Rogue Emperor and The Empire of Time, all featuring Intertemporal Agent Jerry Pierce. Allohistorical content is variable, with Rogue Emperor being the most explicit.

Kilian, Crawford. The Fall of the Republic
Summary: Mental Trainables of 1998 use information gained from the future of a similar timeline to speed up the end of an American Emergency.
Series note: First volume in The Chronoplane Wars.
Published: Ballantine/Del Rey 1987 (0345342739BUY); Legend 1988 (0099588900); iUniverse.com 1998 (1583481214BUY).

Kilian, Crawford. Rogue Emperor
Divergence: 94 CE
Summary: Intemporal Agent Jerry Pierce investigates the assassination by antitank weapon of the Roman emperor Domitian in 100 CE of another timeline, and discovers a plot by Christian Militants to take over the Roman empire.
Series note: Second volume in The Chronoplane Wars.
Published: Ballantine/Del Rey 1988 (0345350782BUY); iUniverse.com 1998 (158348017XBUY).

Kilian, Crawford. The Empire of Time
Summary: Pierce tries to find out how disaster struck Earth in the future, visiting alternate Earths along the way.
Series note: Third volume in The Chronoplane Wars.
Published: Ballantine/Del Rey 1978, 1985 (0345325281BUY), 1987 (0345347595BUY); Legend 1988 (0099588803); iUniverse.com 1998 (1583481206BUY).