I can't find the thread now, but I'm sure that I've asked for help connected Grace May North before. She has proven to be remarkably elusive. But this message isn't about connecting her (although we still need help with that).
I created her profile in the first place because I've been reading those of her books which I've been able to find on Project Gutenberg (either under Grace May North or her pen name, Carol Norton) to the light of my life and the delight of my eyes as bedtime stories, and we've been having so much fun with them that I decided to try looking for those of her works which Project Gutenberg doesn't have.
Oh. My. Word. If I want a copy of either of the last two books in her Adele Doring series, I'd need to be prepared to shell out up to $200 apiece. For an author who's so hard to find any information about, she commands a pretty premium price on the secondhand market. I had no idea, because the light of my life and the delight of my eyes found the first of her books that we read together (Bobs, A Girl Detective) in a used bookstore for a song.
So, if you're the kind of person who shops in thrift stores and used bookstores, and you happen across any of Grace's titles which aren't already in the public domain, they may be worth enough to pay for your subscription to a pay genealogy site for a year...