I have exactly this problem. Beej's Guide to Network Programming is indexed just fine. Beej's Guide to C won't index.
The automated tool says it's in violation of some unnamed rule, but I can't figure out which. There's zero SEO, tracking, or ads, and the content is educational and G-rated.
All the other guides index just fine.
I asked for a review and they came back with the same ambiguous message. Eventually I just gave up.
Recently I split the C guide in two. I'll have to check to see if that made any difference.
But it left a bad taste, and now I don't trust Bing or DDG to provide complete results. Google's overrun with spam, but at least my stuff actually shows up on Startpage.
The automated tool says it's in violation of some unnamed rule, but I can't figure out which. There's zero SEO, tracking, or ads, and the content is educational and G-rated.
All the other guides index just fine.
I asked for a review and they came back with the same ambiguous message. Eventually I just gave up.
Recently I split the C guide in two. I'll have to check to see if that made any difference.
But it left a bad taste, and now I don't trust Bing or DDG to provide complete results. Google's overrun with spam, but at least my stuff actually shows up on Startpage.