The term "espionage" in literature has appeared in a variety of contexts, reflecting its flexibility as both a literal and metaphorical device. For instance, Bernard Shaw employs the word to critique state security practices amid public dissent, demonstrating its political connotation in [1]. In contrast, Wirt Sikes uses espionage to underscore personal suspicions within domestic relationships, broadening its application to interpersonal realms [2]. Agatha Christie’s playful repetition in [3] and [4] hints at the word’s pivotal role in mystery narratives, where it teases the reader with hidden truths. Similarly, John Buchan’s reference to aerial espionage in [5] and the usage in Charlotte Brontë’s "Villette" ([6] and [7]) evoke an image of surveillance that borders on the invasive, simultaneously symbolizing control and rebellion. Even translations, as seen in Benito Pérez Galdós’s work [8], confirm the term’s universal resonance across languages and cultures.