Your Enneagram Type
Here’s the page on Bea’s and Uranio’s website: https://cpenneagram.com/the-nine-enneagram-types. If you drill down, you'll find information on subtypes.
This link leads to two of my favorite enneagram books: https://cpenneagram.com/enneagram-books The first book by Bea and Uranio is very concise. The second, by Bea alone, goes into much more detail. (The third book pertains to the workplace.)