Maigret discussion

I have possibly read all of the translated-to-English books authored by Georges Simenon, both Maigrets and non-Maigrets. I know there are books that ten years ago or so that had not been translated to English (to book form), but when trying to find if there are any new ones, it is confusing, especially since so many books are being retranslated and retitled (the same books I've read before). Any advice how to find any truly newly tranlated for the first time books, short stories, etc.? Thank you.