Secrets of Early ChristianityFederico Puigdevall, Francisco Javier Martínez · First published 2017Open the Tome
The Secrets of Ancient EgyptFederico Puigdevall, Albert Canagueral, Jean-Pierre Houdin · First published 2017Open the Tome
The Secrets of Ancient TombsFederico Puigdevall, Johan Reinhard, Nicholas Reeves · First published 2017Open the Tome
The Secrets of Early American CivilizationsFederico Puigdevall, Albert Canagueral, Mercedes de La Garza · First published 2017Open the Tome
The Secrets of the World's SeasGabriel Glasman, Federico Puigdevall, Fernando López Trujillo · First published 2017Open the Tome
