The book "Oeralind book, from a manuscript of the thirteenth century" is a unique artifact of an ancient period that reveals the secrets of the history and culture of the Frisian people. A manuscript found in a monastery in the Netherlands contains legends, myths, genealogical tables and religious rites that trace the origins of the Frisians and their beliefs. This book fascinates with its mystery and discoveries that help to better understand the past and national identity of this ancient people. The "Book of Oeralind, from a Thirteenth Century Manuscript" is a valuable source for the study of Frisian history and culture and remains a subject of fascination and speculation among historians and researchers.