The Inscrutable Charlie Muffin is a spy thriller written by Brian Frimpton. The book tells the story of Charles Muffin, a former agent of the British intelligence agency, who returns to the game to uncover and warn of a mysterious plot that threatens national security. Muffin is an extraordinary hero with his own value system and unique way of acting. He has gone through many trials, but his determination and devotion to his native country allow him to lead it. Convoluted storylines, unexpected turns of events and trails of spy intrigue make this book exciting for fans of the genre. "The Inscrutable Charlie Muffin" is a gripping tale of loyalty, intrigue, and danger that will keep readers holding their breath until the last page.