I recently purchased a book online and upon receiving it I noticed this white substance on the bottom of the front and back covers and inside the spine. My first thought is mold, but the book doesn’t have a smell, and all the pages appear to be clean. Any other thoughts? I’m debating if it’s worth trying to save or I should just seek a refund. Thanks
https://imgur.com/a/9Tny28V
by riverbrethren