Here are a few books by Radionic pioneer David Tansley.

Someone in the group was enquiring about the Pegotty, in particular the rendition by Berkana Labs and where to find rates. Any Base 10 rate will do. In the guide Copen rates are suggested.

Here are a few list of Copen rates along with the guides for both the 3 dial and the Pegotty by Berkana Labs.

You can also do a search in the group for De la Warr or Copen for an abundance of texts provided by an amazing group member.

Here are some images of Darrel Butcher's "automatic" radionic instruments and design elements.

A few articles by Duncan Laurie:

https://www.aetherforce.energy/an-interview-with-duncan-laurie-author-of-radionics-the-secret-art/