The acquaintance of Franz Kafka with Felice Bauer on the evening of August 13, 1912, was destined to evolve into a lifelong relationship with many upheavals between the two. The result of this relationship is their long-term correspondence.

As Elias Canetti writes: "the specific letters [...] are necessary for Kafka's own writings." Initially, Kafka writes to Felice daily. Subsequently, his indecisiveness and hesitation to proceed with marriage to her become apparent.

Their correspondence, passing through various phases and marking the transformations of their own relationship, which are many, will last until 1917, a few years before the author's death. The corpus of Kafka's letters to Felice serves as a reference point for the life and work of the great creator and seals a unique relationship that defined him.