What's up with this book? Is it basically a forgery?

It's a collection of Nietzsche's notes stitched together and published posthumously.

You could say it's "not canon", though it is studied, kind of like On Truth and Lies in a Non-Moral Sense.

No one considers it a forgery, it's in Nietzsche's handwriting. Part was forged, but that isn't published with it, that was only in the Naziboo editions. The edition in the OP is strictly Nietzsche, no forgery.

>>1210212
It's not only "canon", it's crucial to understanding Nietzsche. 99% of misconceptions about Nietzsche are due to not having read The Will to Power. They are not just diary entries, they were notes specifically for a work with that title that Nietzsche planned to publish, meant to be his magnum opus `

>>1210212
Basically this. It was edited by Nietzsche's sister, who was a huge nazi supporter. It's basically all the parts of Nietzsche's thought that might be misconstrued to support Nazi ideology out of context stripped of that context and put together.

>>1210711
The only edition edited by Nietzsche's sister was the one published in Nazi Germany.

>>1210711
If you actually read that version there's really nothing in it that ties in with Nazis at all. In fact, it makes perfect sense with the rest of his works.

Notes.

Should be considered in context of what he actually deemed worth publishing.