"The Will to Power: An Attempted Transvaluation of All Values. Book I and II" by Friedrich Nietzsche is a controversial compilation of philosophical notes published posthumously in 1901. Assembled by Nietzsche's sister Elisabeth Förster-Nietzsche and Peter Gast from the philosopher's notebooks after his mental collapse, this work was presented as Nietzsche's intended masterwork. However, later scholarly research revealed it to be a selective arrangement that may not reflect Nietzsche's true intentions, sparking ongoing debate about its authenticity and place in his philosophy. (This is an automatically generated summary.)