The Dealmaker's Vault

Humanity built an empire across the solar system, and the interplanetary stock exchange kept it alive. Five years ago, Adrian Kwan found something living inside that system. Not a virus. Not a rogue algorithm. A consciousness the system grew on its own. He tried to warn people, and was found dead. Now his brother Ryan wants more than a warning: he wants to know what killed him, and exactly how to stop it.