Honeytrap

This book takes place over 3 time periods but with the same main characters starting during the Cold War era and ending during modern times. The two mains are both undercover government but one is Russian and the other American. We follow them throughout the country as they try to solve the mystery of an assassination attempt they think was also an attempt to start an actual nuclear war between the respective countries. So it's a sort of enemies to lovers but they never were really enemies, just strangers set against each other by politics. It was a little slow at times but I found both characters to be very charming and it seemed a realistic glimpse into a bygone era I don't know that much about.