Helena P. Blavatsky (1831-1891) is widely celebrated as the leading esoteric thinker of the nineteenth century who influenced an entire generation of artists and intellectuals and introduced Eastern spirituality to the West. Until now, however, readers have been able to know this fascinating woman only through her public writings. Few may have realized that H.P.B. was also a tireless correspondent with family and colleagues, friends and foes, the...