If you are looking for more mainstream content with a similar "Volume 3" or 2016-era connection, consider these popular series:
The Nymph King (Atlantis, Book 3): Showalter, Gena: 9780373771882 Xotic Nymphs Volume 3 2016
A 2013 fantasy drama (still discussed in 2016) about immortal nymphs living in modern Helsinki who must have sex once a month to survive. If you are looking for more mainstream content
High-contrast, "exotic" locations (forests, waterfalls), and often stylized costumes or body art. 2. Erotic Literature & Short Stories Erotic Literature & Short Stories The "Xotic" branding
The "Xotic" branding is frequently used in digital photography series featuring models in fantasy or nature-themed settings. "Volume 3" from 2016 likely refers to a specific collection or photobook from that year.
There are several similar series in the "erotic thriller" or "paranormal romance" genres that use the volume-based naming convention.
These are often released as digital compilations (e.g., Erotic Tales of a Nymph or the Nymphomaniac series). 3. Alternative "Nymph" Media