Novel
11,000 Years, Ring of Fire Press (2021) (RoFPress closed 2022)
– republished, Novus Mundi Publications, (2023) https://www.amazon.com/11-000-Years-Mark-Roth-Whitworth-ebook/dp/B0CC3JWYTZ/ref=sr_1_1
Becoming Terran, from Novus Mundi https://www.amazon.com/Becoming-Terran-Mark-Roth-Whitworth-ebook/dp/B0CM8S6GZW/
Both are also available on B&N, smashwords, Kobo, and your favorite source.
Short fiction
Red Makes Friends, Grantville Gazette #87
Marianne, Grantville Gazette #97
Finding Her Way, Grantville Gazette #101