Joe Gall, The Nullifier, goes after some hippies and other malcontents (secretly backed by Commies, natch) trying to overthrow the Canadian government in Philip Atlee's The White Wolverine Contract.
By pure coincidence I bought three Joe Gall books from the White Rabbit Bookstore in Muncie, Indiana that happened to fall right in sequence. The previous one I read, The Canadian Bomber Contract, also took place in the Great White North.
The time is the early 70s, and spy Joe Gall's swingin' days are dimming somewhat. In fact, long passages of this one read more like a travelogue, with a few fistfights and some skirt-chasing mixed in. However, this throwback story is still enjoyable, and rather curiously was nominated for the prestigious Edgar Award in 1972. More for fans of the Gold Medal books of this time period, but despite that I'm sure I'll start the next one, The Kiwi Contract, before long.