I enjoyed this far more than I anticipated based on the opening pages. Maybe it was a case of the right book at the right time, since I don't usually go for the action/adventure end of the sci-fi spectrum. But Pournelle's tale of civil war set on a colonized Mars was reminiscent of Jack London's best work. His central protagonist, Garrett Pittson is, like London's best characters, tough, yet thoughtful, hard, but not superficial. That may be the key to why I enjoyed this lightweight, fast-paced romp so much. The science was plausible from a mid-70s perspective, but the science was secondary to the plot and character development. And if Pournelle's efforts weren't always flawless (I was particularly irked by Erica's stand-by-your-mannerisms when confronting Pittson's infidelity), they were close enough to leave me wanting more. A story like this relies on well-wrought characters, plausible plot threads, and believable dialogue, and Pournelle delivers on all counts.