Allyn Jackson, “Comme appelé du néant—As ifsummoned from the void: The life of Alexandre Gro-thendieck”, Notices, October 2004 and November 2004.Grothendieck around 1936 in the garden of the Heydorn’shouse in Hamburg-Blankenese.Archive of Winfried Scharlau.
this seems to be more of the sort of biography of Grothendieck that I'd be interested in reading.