The Intriguers
Donald Hamilton
 This novel is a direct follow-up to The Poisoners. It is also the first book in the Matt Helm series to focus on Helm's superior, Mac, whose full name is revealed for the first time as Arthur McGillivray Borden. The storyline of this book is rather uncharacteristic because, instead of fighting terrorists and enemy names, Helm and Mac work together to bring down unfriendly elements from within their own government, in particular a man who is threatening Mac's authority.