Charles Webster Leadbeater was influential early in the development of mixed gender Freemasonry and at the peak of the Theosophical influence. Annie Besant was also a Theosophist and she also introduced Theosophical elements into her Freemasonry, but Leadbeater (together with Wedgewood) went way over Besant in that regard.
Leadbeater wrote a lot, but it seems that his bibliography contains just two books about Freemasonry, both published in 1926. The first is called ‘Glimpses of Masonic History’ (
later:  Ancient Mystic Rites). The second ‘The Hidden Life in Freemasonry’. 
Combining seership with science, in ‘Glimpses of Masonic History’ Leadbeater presents an absorbing, in-depth, study of the mystery schools of Egypt, Greece, Judea, the Knights Templar of the Middle Ages, and the emergence of Co-Masonry in the twentieth century.