Ya Fukuda, "Composers ◎People and Works Liszt" - Biography recommended to learn about the life of the pianist famous for his superb technique.
This biography also tells quite a bit about the mental anguish of the genius list.
It was surprising that the list had religious issues there, as well as problems in his personal life and in his family. It was surprising that he had pondered about faith issues until he tried to become a clergyman.
In addition to his biography, this book includes a commentary on his work at the end of the book.