JET - Reckoning: (Volume 4)

JET – Reckoning pits Jet against the deadliest threat yet: an enemy with endless resources who will stop at nothing to destroy her. From the mountains of Indonesia to the streets of Washington, Jet discovers in a breakneck-paced roller-coaster of action that danger lurks in the unlikeliest of places and nothing is as it seems.

This is the fourth novel in the JET series. The suggested reading order is:

JET - Ops Files (prequel)
JET
JET - Betrayal
JET - Vengeance
JET - Reckoning
JET - Legacy
JET - Justice
JET - Sanctuary