Biographie de René Friedrich
The author has been dealing with problems of Einstein's relativity for more than ten years, and his aim is to make general relativity accessible to people interested in physics and (ideally) even to school teaching. Since he is not a recognized specialist in the field, his ideas are currently largely ignored by the official physics community. However, in 2023 he received an honorable mention in the well-established Gravity Essay Competition organized by the Gravity Research Foundation (GRF).
The subject of his essay was the infalling observer of a black hole. The idea is discussed in Chapter 5 of the book.