The Mysterious Moonstone (Key Hunters #1), Volume 1

Getting lost in a good book has never been this dangerous Cleo and Evan have a secret. A collection of books so dangerous they are locked up tight. A friend has vanished inside the pages of one of them. It’s up to them to find the key that will set her free. A PRICELESS DIAMOND…STOLEN When Cleo and Evan go undercover to help a rookie detective interview a mansion full of suspects, nothing is as it seems. They must catch the crook and find the right key or they could be trapped inside this mystery forever…