The author of Sefer ha-Yashar, together with the author of Jossipon, is credited with adding another aspect to the medieval story about biblical times: they attempted, and frequently succeeded, in incorporating non-Jewish legends, history, and mythology into the biblical story. The Jews of the Byzantine Empire, Italy, and Spain accepted the legends and history of the people among whom they lived as being part of the history of the world, and argued that as such they form part of the Bible which was believed to include all the important events in human history. These authors, and others, therefore, developed a system of synchronization and analogy to establish a connection between non-Jewish stories and biblical heroes and chronology.

בשער: תרפ"ג. דפוס-צילום של הוצאה זו, בהשמטת הקדמת אליעזר גולדשמידט והשער-הנוסף.