Twice a Spy by Keith Thomson (Charlie and Drummond Clark #2)

Thanks to Itzy for this :-D
On the heels of Once a Spy, which PW hailed as a “wildly original debut [with] an action-packed story line,” Keith Thomson returns with a breakneck thriller that’s twice as explosive as the original.

Charlie and Drummond Clark are now in Switzerland, hiding out from criminal charges in America and using the time to experiment with treatments to retrieve Drummond’s memory. When NSA operative Alice Rutherford, with whom Charlie has fallen in love, is kidnapped, the Clarks must dodge a formidable CIA case officer and his team to get her back.