There are some areas where Kramer is quite perceptive. I really liked the point that, by resigning her university positions, Montessori gave her later work a necessarily commercial edge. At the same time, Kramer speculates far too much on Montessori's unconscious thoughts. I lost count of how many times she paused to say some version of "could this have been because she had given up the chance to raise her own child?" Kramer often falls into the trap of psychoanalyzing Montessori, and she doesn't have much to go on. Montessori does not seem to have kept up an intimate correspondence with anyone, and there is no indication that she left behind a diary. In that way, her life is a biographer's nightmare: there is no way to find the “person behind the public figure.” I understand why Kramer felt the urge to speculate, but I don't think it was responsible authorship.
That brings me to the great problem with this biography. It isn't a bad book. It's competently written, has accessible prose, and is thoroughly researched. Despite all that, I found it a slog to get through. The fact is that Montessori's life didn't change much after her method became popular. She traveled all over the world, but she essentially did the same thing everywhere. The work itself is interesting, but the story of the work is not. The last section of the biography is essentially the same story, repeated over and over. It isn't badly told, but it isn't interesting after the third telling. I don't know that there's really anything to be done about that. As I mentioned, Montessori doesn't seem to have left behind anything that would give us a sense of what her life was really like. If Kramer's book reads like a long string of identical news articles, it's because news articles are really all she had to go on. We don't know why Montessori fled Barcelona when she did or how she felt about being unexpectedly trapped in India for seven years upon the outbreak of World War II. We don't even know how she managed to finagle her way into medical school. Montessori took care to make sure that her work dominated our image of her, and that makes it basically impossible to write an interesting book about her personal life.
Interestingly, Kramer's biography instantly dates itself by its major criticism of Montessori's method: she cannot forgive Montessori for ignoring the work of Sigmund Freud. In our current intellectual climate, which doesn't take Freud all that seriously, this seems as charmingly quaint as Montessori's 1908 recommendation that children eat raw eggs “still warm from the hen.” What it really goes to show, though, is how extraordinarily well Montessori's method has aged. She was giving training courses before Erickson, Piaget, or Vygotsky ever thought of doing research on child development. She developed the basics of her method at a time when Freud was the latest word on child psychology. Plenty of people still took phrenology seriously, and nutritionists believed that children shouldn't eat vegetables. Yet, somehow, she managed to develop a system that still works.