It's possible that:
* The title is incorrect: Check your source for any typos or misspellings.
* It's a niche or unpublished work: It might be a self-published or obscure series.
* You're looking for something else: Double-check the title, author, or genre you're searching for.
To find the release dates, you can try:
* Searching for the title online: Use search engines like Google or specialized book databases.
* Checking author websites or social media: If you know the author, they might have information on their website or social media pages.
* Consulting libraries or bookstores: Local libraries or bookstores may have information about the series.
Please provide more details about the series or the context where you encountered this title. This will help me provide a more accurate answer.