Assuming that:
1) "Andrea Vassell" is a pseudonym (so that Google won't confirm claim for panel) or author just does not want send any extra information to Google
2) There are multiple "Andrea Vassell" writers, fitting Wikidata eligibility criteria
The solution would be:
1) Find origins of wrong images
2) Create a Wikidata item for each author and link each item to pages, which contain relevant images with https://www.wikidata.org/wiki/Property:P973
3) It is a good idea to create a page, describing original "Andrea Vassell" starting with a definition in a form of "Andrea Vassell is an NNNan writer, publisher of non-fiction books ...etc...". This page may contain the images of books (so that final card may look like https://www.google.com/search?kgmid=/g/122rd6_8&hl=en)
Step-by-step example:
1) I was notified that Google Knowledge Graph mixes Russian historian Andrey Simonov and American economist Andrey Simonov (wrong page snapshot: https://web.archive.org/web/20201202182248/https://www.googl...)
2) I created https://www.wikidata.org/wiki/Q41802044, https://www.wikidata.org/wiki/Q103187106, https://www.wikidata.org/wiki/Q103378461 and improved https://www.wikidata.org/wiki/Q4419737 (as all of them are passing notability requirements)
3) After few weeks Google removed photo of economist from historian (https://www.google.com/search?kgmid=/g/1hb_dk0rq&hl=en), because this photo was attached to economist card https://www.google.com/search?kgmid=/g/11fyy5b4yb&hl=en
Disclosure: I'm a Wikidata editor with 10M+ edits (mostly tool-assisted, of course). Have no relation with Google, other than hundreds of unsuccessful attempts to communicate with a brick wall of Google's contact form.