Dr Stephen Skinner is an expert in 15th and 16th-century manuscripts, having edited Dr John Dee's Spiritual Diaries. He has written more than 40 books on Western esoteric traditions, as well as academic studies of medieval grimoires and Graeco-Egyptian papyri. His knowledge of the Voynich Manuscript period qualifies him to fill in the gaps in our knowledge of this amazing artefact.Dr Rafał T. Prinke is a historian and an assistant professor at Eugeniusz Piasecki University in Poznań, Poland. He recently published a 900-page book on alchemical writings from the earliest times until the end of the 18th century. He is also, along with Stephen Skinner, one of the contributors to the Watkins edition of The Voynich Manuscript.