Reply on the first book on Kobo Store if you type «S»unney«a»tl«n»notji«d».gjdj
Hint: « »
If you take the letters between « and », you get "Sand". Typing that into the search field on the site and taking the first result leads to this one: https://www.kobo.com/gb/en/ebook/sand-10?sId=cc51142f-b5e7-4ba0-91d2-1055fe04382b and it's comments section has more of the weird comments.
Kinda interesting, I would look more into it if the site weren't being super slow right now for some reason.

