In a new interview with the writer of Daphne & Velma novels, Morgan Baden, it's been revealed that the Daphne & Velma series of young adult novels is a trilogy, which will end after the third novel set to be released in June. The interview also revealed that the third novel will be titled "Buried Secrets."
Though the first book was written by Josephine Ruby, a pseudonym, it's sort of hinted that this was Morgan Baden as well in the interview.
Morgan also shares the summary for book 3:
"In Buried Secrets, a television show based on the mysteries of Crystal Cove is being filmed in town, and of course Daphne and Velma are involved with it…and of course, some mysterious things happen. We really heightened the stakes in this book in significant ways, thanks to your suggestions, Beth! People get hurt…and someone even gets murdered. So Daphne and Velma, with help from Shaggy and Fred, have a really big case on their hands."
One thing worth noting from this interview is that it says the book will be released in July, despite that news just broke out yesterday that the release date will be June 1, 2021. I believe that the article saying it will be released in July is a typo, because even the hyperlink right before the mention of July links to sources that say June 1 is the release date.
Thanks so much to Gibby Norton to bringing this interview to my attention! You can check out the interview in its entirety here.