Statement from Vera Valentine: I do not give permission for any of my works or derivatives thereof to be used for profit (e.g. selling of merchandise, creation of "fan art" for subscription-based services like Patreon, use of read-aloud performance for "lives" on social and streaming services, etc.) without an express, clear agreement between myself and the performer/creator/artist, arranged beforehand. This includes my cover art. 

TLDR:  If it's not yours, don't use it. 

(Note: This doesn't include using a picture of a cover or short quotes for reading roundups, reviews, memes, etc. That's expected in our social media-driven industry, and totally fine as long as it's not being used to promote something problematic. Thank you for respecting my intellectual property!)