However, he did:
* Leave behind a manifesto outlining his extremist views and plans for violence. This manifesto was used as evidence during his trial and is available online.
* Produce numerous audio recordings while in prison, expressing his beliefs and plans.
* Write a book while in prison, titled "Lone Wolf: The Autobiography of a White Revolutionary." This book was not published but exists in manuscript form and is often cited by white supremacist groups.
It's important to note that accessing these materials should be done with caution, as they contain extreme and hateful content.