If you're looking for information on how to access or purchase "XConfessions Vol. 4" by Erika Lust, I suggest checking online marketplaces or bookstores that specialize in adult content. Some popular platforms may carry this title.
Despite its prestige, the anthology format receives mixed feedback: XConfessions 7 (2016) - Letterboxd
Utilizing high production values and artistic direction to elevate the storytelling. Intersection with Digital Media