Fonda Lee - Jáde war

On the island of Kekon, the bitter feud between the clans continues. The stake is now not only who will rule the capital, but who will decide the fate of the magically powerful jade, which has empowered the Greenbone warriors for thousands of years.
And a war is brewing beyond Kekon's borders. The powerful leaders of foreign governments and criminal syndicates have a toothache for the treasure of the island nation. Jade can make them richer and give them the chance to get rid of their rivals.
Threatened from all directions, the Kauls are forced to make new, dangerous alliances, confront their enemies in the darkest streets and in the highest office towers, and put aside their honor to ensure the survival of the family - and all the Greenbones of Kekon.

The Greenbone Saga is the best kind of urban fantasy; A magical kung fu family infused with gangster history, honor and warriors who live and die by the ancient laws of blood and jade.