Yes, it is, and that may have been a bad idea on my part. The books are both part of our upcoming post-apocalyptic near-future Earth setting "The Radlands" and detail two different approaches taken by competing governments and institutes to "improve" humanity. The first book - The Prometheus Protocols - outlines the history of the experiments by non-military concerns to create a way to generally improve humanity. The second book - The Medved Trials - outlines the history of the Russian "super-soldier" program.
Ostensibly, the Prometheus Protocols can be taken as a starting race *or* applied to an existing human character at any level by "multi-classing" into the program - that is, a PC could take Prometheus Phase 1 instead of a class level. The Medved program was not designed to enhance an existing human, but redesigned humans from scratch and are thus presented as three separate races at 10, 20, and 30RP. While there are similarities between the two outcomes - and, in fact, there is a "super-soldier" series of Prometheus - they do reflect distinctly different philosophies of "improvement."
I hope this helps!