1844-1900. German philologist, philosopher, cultural critic, poet and composer. He wrote several critical texts on religion, morality, contemporary culture, philosophy and science, displaying a fondness for metaphor, irony and aphorism.
Nietzsche began his career as a classical philologist - a scholar of Greek and Roman textual criticism - before turning to philosophy. In 1869, at age twenty-four, he was appointed to the Chair of Classical Philology at the University of Basel, the youngest individual to have held this position. He resigned in the summer of 1879 due to health problems that plagued him most of his life. In 1889, at age forty-four, he suffered a collapse and a complete loss of his mental faculties. The breakdown was later ascribed to atypical general paresis due to tertiary syphilis, but this diagnosis has come into question. Nietzsche lived his remaining years in the care of his mother until her death in 1897, after which he fell under the care of his sister Elisabeth Förster-Nietzsche until his death in 1900.
The Free Dictionary

Preface; Book I; Book II; Book III; Book IV; Book V.