Okay, here is the translation following your instructions: Fast walk Slow return

Author: Fred Varga
Publisher:
Publish Date: 2005-08-01
Features: Copyrighted in 25 countries, Best French Detective Novel Award, European Young Readers Award, upcoming film adaptation of the same name. Varga is a mystery, with readership almost unprecedented. – Le Monde This renowned detective novelist has a highly sensitive perception and an extremely rich imagination. – Le Figaro The novel is meticulously crafted like a diamond. – Libération Varga gives us a lesson in philosophy and literature. – L'Obs Varga's new work may be her most perfect to date. – L'Obs
In 21st-century Paris, strange four-letter symbols appeared on the doors of many buildings in the city. Subsequently, one after another, men and women died mysteriously, their bodies turning black and covered with fleas, reminiscent of the Black Death – plague – that ravaged the world centuries ago and claimed millions of lives. Panic erupted in Paris, with people living in fear, the media stirring up trouble, and the police overwhelmed. Eventually, through expert investigation, it was discovered that the four-letter signature CLT was an abbreviation of the medieval saying "Flee! Return Slowly" aimed at combating the plague.
A detective who solves cases by intuition draws inspiration from a ring and, with the help of a brilliant psychologist and a quirky historian, apprehends the person spreading the plague, unraveling a Christophe-Hellion-style case of revenge. However, the real is still lurking in the shadows.
Through the unfolding of the events and an analysis of the motives behind the crimes, the novel reveals certain weaknesses of human nature, pointing out that the indifference and selfishness of modern society lead to loneliness, which can easily drive people to and madness. Modern civilization can be easily destroyed by irrational fanatics.
This is the masterpiece of Fred Varga, a renowned French detective novelist known as the "Queen of French Detective Novels," who has won numerous international awards. It has been translated into over 20 languages and published in more than 50 countries worldwide. A film adaptation based on this book is set to be released by French film company Gaumont.