Tuttle's works are divided into two collections, the Alcea Collection and the Khadora Collection. Each collection revolves around a different world and time. 

The Khadora Collection includes the Forgotten Legacy series, an eight volume epic fantasy adventure featuring three unlikely heroes, each introduced in their own volume. The Forgotten Legacy is about the awakening of a long forgotten prophecy that will shake the foundations of every nation in the world.

The Alcea Collection includes the Targa Trilogy, the seven volume Sword of Heavens series, and the Demonstone Chronicles series. The Targa Trilogy is the foundation of the Alcea Collection, and it introduces three main heroes who will go on to become legends for future generations. The Sword of Heavens series features five young adults known as the Children of the Ancient Prophecy. Those Children will hold the fate of the world in their hands as they battle unspeakable odds in their quest to restore the legendary Sword of Heavens and save the world from obliteration. The Demonstone Chronicles begin three years after the end of the Sword of Heavens series. While everyone thought the world was finally at peace, a diabolical plot to destroy Alcea is set in motion, and the Alceans do not even know what is coming.

Both Collections are available in print and ebook formats. The Targa Trilogy and the Sword of Heavens are also available in various audio formats including traditional Multi-CD audiobook sets, MP3 Audiobook CDs, and MP3 downloadable audiobooks.