Cover art
Frankowski, Leo. The Cross-Time Engineer. Translated to the Italian as Le avventure di Conrad Stargard, Nord 1993.

Frankowski, Leo. Adventures of Conrad Stargard
Divergence: 1240 CE
Summary: An engineer accidentally transported back to medieval Poland decides to defeat the coming Mongol invasion.
Series note: Series including The Cross-Time Engineer, The High-Tech Knight, The Radiant Warrior, The Flying Warlord, Lord Conrad's Lady, Conrad's Quest for Rubber, and Conrad's Time Machine.

Frankowski, Leo. The Cross-Time Engineer
Divergence: 1240 CE
Series note: First in the Adventures of Conrad Stargard.
Published: Ballantine/Del Rey 1986/1998 (0345327624).
Original in: English.
Translation: Italian by Alessandro Zabini as Le avventure di Conrad Stargard, Nord 1993 (8842907197).

Frankowski, Leo. The High-Tech Knight
Divergence: 1240 CE
Series note: Second in the Adventures of Conrad Stargard.
Published: Ballantine/Del Rey 1989/1998 (0345327632w88 android).
Original in: English.
Translation: Italian by Alessandro Zabini as Sir Conrad, cavaliere del tempo, Nord 1994 (88429077790).

Frankowski, Leo. The Flying Warlord
Divergence: 1240 CE
Series note: Third in the Adventures of Conrad Stargard.
Published: Ballantine/Del Rey 1989/1998 (0345327659BUY).
Original in: English.
Translation: Italian by Alessandro Zabini as La valle del massacro, Nord 1996 (8842908754).

Frankowski, Leo. The Radiant Warrior
Divergence: 1240 CE
Series note: Fourth in the Adventures of Conrad Stargard.
Published: Ballantine/Del Rey 1989/1998 (0345327640); Baen 2004 (0743488636BUY).
Original in: English.
Translation: Italian by Alessandro Zabini as L'armata degli eroi, Nord 1995 (884290810X).

Frankowski, Leo. Lord Conrad's Lady [vt Conrad's Lady]
Divergence: 1240 CE
Series note: Fifth in the Adventures of Conrad Stargard.
Published: As Lord Conrad's Lady, Ballantine/Del Rey 1990/1998 (0345368495BUY).
— As Conrad's Lady, Baen 2005 (1416509194BUY).
Original in: English.
Translation: Italian by Alessandro Zabini as L' ultima crociata di Conrad Stargard, Nord 1996 (8842909354).

Cover art
Frankowski, Leo. Conrad's Quest for Rubber. Ballantine/Del Rey 1998.

Frankowski, Leo. Conrad's Quest for Rubber
Series note: Sixth in the Adventures of Conrad Stargard.
Published: Ballantine/Del Rey 1998 (0345368509BUY).

Frankowski, Leo. Conrad's Time Machine
Summary: A prequel explaining the origins of the time machine.
Series note: Seventh in the Adventures of Conrad Stargard.
Published: Baen 2002 (0743435575BUY).