What has the author J Renner written?

There is no widely known author named "J Renner." It's possible that:

* The name is misspelled: Double-check the spelling. Is it perhaps "J. Renner" or "JR Renner"?

* The author is not very well-known: They might be a newer author, or write in a niche genre.

* The author uses a pen name: They may be publishing under a different name.

To find out more, you could try:

* Searching online book databases: Use sites like Goodreads, Amazon, or WorldCat.

* Checking author websites: Search for the author's name online and see if they have a website.

* Asking in relevant online communities: Post a query on forums or social media groups for book lovers or writers.

Please provide more context or information if you can, and I'll try my best to help you find the author you're looking for.