Arnold Marmor (1927–1978) is an author about whom little public information is currently available; existing Chinese-language library records contain scant biographical detail, with no confirmed record of his nationality, education, or professional career. According to library holdings, he was born in 1927 and died in 1978, a life spanning the social upheavals of the mid-twentieth century. Only one work under his name can be confirmed, namely Spies Die Hard! Judging from its title, the book likely belongs to the popular spy or thriller genre, which typically centers on tense plots, secretive characters, and dangerous confrontations, with emphasis on narrative pacing and suspense. Given the limited material, a full assessment of his writing style and literary standing is difficult, and the later circulation and influence of his work await further research.