There are many good spy novels. Here are some recommendations: 1 " Lord Snow Eagle ": This is a spy novel with the theme of national security. The background of the story is a fictional world called " Lord Snow Eagle ". The protagonist is an excellent agent who has experienced various challenges and thrilling adventures in the process of carrying out his mission. 2 " Battle Through the Heavens ": This is a novel with a fantasy theme. It tells the story of a young man's growth. In the process of cultivation, he encountered various enemies and challenges, and at the same time, he solved some national security problems. 3 " Sword Comes ": This is a novel with the theme of martial arts. It tells the story of a swordsman's growth. In the process of cultivation, he encountered various enemies and challenges, and at the same time, he solved some national security problems. 4 " Special Agent Mission ": This is a national security themed spy novel. The protagonist is an excellent agent. He encountered various challenges and thrilling adventures in the process of carrying out the mission, and also helped the country solve some important problems. These novels were all very popular and could be chosen according to one's preferences.