First published 2008
Cass and Max-Ernest stand at the threshold of the mysterious Terces Society, ready for initiation into its secrets. Their battle against the sinister Dr. L and Ms. Mauvais continues as they navigate this new world of hidden knowledge. The young detectives stumble into the Museum of Magic, where they encounter Pietro, a figure they have long waited to meet. Their investigation leads them to a missing Sound Prism and puts them on the trail of the dangerous Lord Pharaoh. At the center of everything lies a creature born in a bottle five centuries ago, holding the key to the greatest secret of all. The children must piece together these mysteries while staying one step ahead of their enemies. As they dig deeper into the Terces Society's world, Cass and Max-Ernest discover that some knowledge comes with a price, and some secrets change everything once you learn them.
Genres: adventure, mystery, fantasy
Vibes: dark, fast-paced, suspenseful, thought-provoking
Tropes: enemies-to-lovers, found-family, mystery
Setting: Museum of Magic, Terces Society
Period: 21st-century
385 pages · Hardcover · Little, Brown Books for Young Readers