Maigret was a British television series that ran on ITV for twelve episodes in 1992 and 1993. It was an adaptation of the books by Georges Simenon featuring his fictional French detective Jules Maigret. Airing in two seasons, each of the episodes was based on a single book. The series covered only 12 of Georges Simenon's 75 novels and 28 short stories about the detective.
More of Georges Simenon's novels were used for the TV show compared to his short stories about the detective.
Based on the context we know that there are 12 episodes, with each being based off of a selection of a single book (75 listed) or short story written (28 listed) but we are not provided the information as to which media was sourced for more episodes in total as my statement dictates.