By the mid-1960s, Tranströmer became close friends with poet Robert Bly. The two corresponded frequently, and Bly would translate Tranströmer's poems into English. In 2001 Bonniers, Tranströmer's publisher, released "Air Mail", a work consisting of Tranströmer's and Bly's day-to-day correspondence on personal, contemporary and literary matters c. 1965–1991 – in a style that vividly conveyed how close friends the two had soon become. Bly also helped arrange readings for his fellow poet in America. The Syrian poet Adunis helped spread Tranströmer's fame in the Arab world, accompanying him on reading tours.