Joshua ben Abraham ibn Gaon of Soria copied and illuminated some of the most luxurious and precious Hebrew bibles produced in the Iberian Peninsula. He produced his work at the beginning of the 14th century in the city of Tudela, Navarre. Two bibles, now in the Bibliothèque nationale de France (Ms héb 20 & 21), copied in under two years, are the work of his atelier. I have recently studied their colophons, introductory poems, subscriptions and annotations, which offer new and valuable information regarding their patronage, use and circulation, and reveal important differences with respect to the historical circumstances in which the manuscripts were produced. This paper will focus on these differences, and will address issues such as the role of both the scribe and the patron in the production of manuscripts, the use of the book as reflected in its historical annotations and marginal texts, and the transmission and circulation of books in the 14th century.