- Series: What Might Have Been Series Record # 7977
- Series Tags: alternate history (6)
- What Might Have Been
- 1 Alternate Empires (1989) [A] by Gregory Benford and Martin H. Greenberg
- 2 Alternate Heroes (1990) [A] by Gregory Benford and Martin H. Greenberg
- 3 Alternate Wars (1991) [A] by Gregory Benford and Martin H. Greenberg
- 4 Alternate Americas (1992) [A] by Gregory Benford and Martin H. Greenberg
- What Might Have Been: Volumes 1 & 2: Alternate Empires / Alternate Heroes (1990) [O/1,2] by Gregory Benford and Martin H. Greenberg
- What Might Have Been: Volumes 3 & 4: Alternate Wars / Alternate Americas (1992) [O/3,4] by Gregory Benford and Martin H. Greenberg