Summary: A year after the events of the first book, our young adventurers Cass and Max-Ernest get their first mission with the Terces Society; use a mysterious orb called the Sound Prism to summon an ancient creature known as the homunculus. The evil leaders of the Midnight Sun, Dr. L and Ms. Mauvais are searching for him too, believing he is the key to finding the Secret, and it's up to Cass, Max-Ernest, and their new friend Yo-Yoji to stop them.
My thoughts: I loved this book just as much, if not more, as the first book. I adore each and every single character, especially Cass's grandfathers. Cass and her friendship with Max-Ernest is really sweet too. If you can't tell, I loved this book and I highly recommend both this book and the first book.