Ninth Step Station
by Malka Older
From the publisher:
A local cop. A US Peacekeeper. A divided Tokyo.
In the future, two mismatched cops must work together to solve crimes in a divided Tokyo.
Years of disaster and conflict have left Tokyo split between great powers. In the city of drone-enforced borders, bodymod black markets, and desperate resistance movements, US peacekeeper Emma Higashi is assigned to partner with Tokyo Metropolitan Police Detective Miyako Koreda. Together, they must race to solve a series of murders that test their relationship and threaten to overturn the balance of global power. And amid the chaos, they each need to decide what they are willing to do for peace.