Michael Kurtz wrote his biography of Sofia Gubaidulina in German in 2001, ending with the premiere of the Johannes-Passion. This English translation by by Christoph K. Lohmann appeared at the end of 2007. It has been updated to include Gubaidulina's life and work up the premiere of "The Light of the End" in 2004.
Kurtz based his biography of Gubaidulina on long discussions with the composer, press clippings, and interviews with Gubaidulina's friends and colleagues, including such obscure figures as Gennady Aigi. While much of the material here will be already known to passionate fans of the composer, I found much new information. I was surprised, for instance, to notice that in spite of the Orthodox references in her works, Gubaidulina actually stands quite a distance from the Church in theology and uses it for convenient symbolism. Also, Gubaidulina's three marriages are discussed, and the precise reasons for her move to Germany.
Unfortunately, there were a few aspects of the biography that I was unhappy with. Unlike Richard Steinitz in his excellent critical biography GYORGY LIGETI: Music of the Imagination, Kurtz discusses only Gubaidulina's life and does not talk about the works much at all--you'll find not a single sample from a score here. And needless to say, Kurtz isn't critical of Gubaidulina's output at all.
Also, the second half of the book gets highly repetitive, where it is basically just travelogues: Gubaidulina goes to city A and premieres a work, then she flies to city B and premieres another work, then she takes a 2-week vacation, then she flies to city C. And attention is given only to concerts of her works when I daresay most Gubaidulina fans (due to the high price of tickets) must now be content with CD releases, and Kurtz doesn't list them or talk about Gubaidulina's feelings about them.
Finally, the beautiful reproduction of Gubaidulina's Zahlenmystik sketch from the Johannes-Passion, present in full color in the German edition, is missing here.