Overthrowing heaven

It began as a favor to a woman trying to get away from her abusive husband. Jon Moore grew up in a prison laboratory. When he escaped with nothing but his body's nanotech enhancements and more anger than even a long lifetime could wash away, an entire planet died behind him. Memories of the things he'd done still haunted him; because of them, he often ended up helping those in need. His kindnesses frequently didn't work out well. This one really didn't work out well. It hurled Jon and Lobo, the intelligent assault vehicle and Jon's only friend, down an accelerating, ever more dangerous spiral!