Mijn beter ik. Herinneringen aan Simon Carmiggelt is a memoir about the extra-marital relationship that Renate Rubinstein had with Simon Carmiggelt, both Dutch writers. The book consists of narrative in the form of a memoir, letters, including facsimile illustrations, and diaries, in which Renate Rubinstein describes how their relationship started, developed and sizzled out.

Simon Carmiggelt was 16 years older than Renate Rubinstein. According to Rubinstein, she and Carmiggelt had oblique contact during the period 1962-1976, as Carmiggelt encouraged her to become a writer. Their relationship started in 1977, around the time Rubinstein was diagnosed with ML, and lasted for several decades until the late 80s. While Rubinstein was never married, Carmiggelt had been married with his wife Tiny since 1939. Their relationship was kept hidden from his wife. Carmiggelt died in 1987, and the memoir was compiled and written during the years after his death. It was published after the death of Rubinstein. She died in 1990, and the first edition came out in 1991.

The memoir is a warm description of the nearly ten years of their contact, both in exchanged letters, as in visits. Sexuality is hinted but not explicitly mentioned.

Sylvia Witteman en Thomas van den Bergh (1998) cast doubt on the veracity of Rubinstein's memoir in their short biography of Carmiggels, S. Carmiggelt. Een levensverhaal. They suggest that Rubinstein exaggerated and that the relationship mainly existed in her mind, rather than in reality. ( )