This publication organises and presents for the first time an extensive collection of letters from and to the Saudi leader reflecting the evolution over fifty years of his status, authority, style and statesmanship. For the most part, the letters are in both Arabic and English. The first items date from the years after his fabled recapture of Riyadh in 1902, when Abdul Aziz emerged as Amir of Nejd. The last letters are from the year of King Abdul Azizs death, 1953.