The title "The Precipice" refers to the "greenhouse cliff", or the ultimate collapse of Earth's biosphere, preceded by the steady encroachment of climate change.
Millionaire Dan Randolf is going bankrupt, since his aerospace company, Astro Corp, is out of work due to the "greenhouse cliff" putting Earth at a higher priority than space.
Cold-hearted multi-billionaire Martin Humphries shows Randolph a fully laid-out plan to reach the Asteroid Belt and mine it for its abundant metals.
While Dan Randolph wants to distribute the Asteroids' resources fairly at a very modest price to aid in the restoration of Earth's climate system, Martin Humphries intends to take over the company and use the monopoly to his own financial gain.
According to Library Journal, The Precipice "highlights current environmental issues and scientific speculation while simultaneously telling a tale of heroes and villains that should appeal to most fans of hard sf.