by Henry H. Beam Piper
He Walked Around the Horses
1948
Police Operation
Last Enemy
1950
Temple Trouble
1951
Time Crime
1955
Lord Kalvan of Otherwhen
1965
Paratime! Collected Paratime Stories
2009
Tales of Paratime
2016
Paratime Parasites
2019
Paratime Wars
2020
8 books
7 books