4892 Philippe Boulanger: Die Unuebersichtlichkeit hochdimensionaler Raeume. Spektrum 1993/8, 26-27. M. Deza/M. Laurent: Geometry of cuts and metrics. Springer 1997, 600p. 3-540-61611-X. DM 168. Donald Knuth: Axioms and hulls. Springer LN Comp. Sci. 606 (1992), 110p. 3-540-55611-7. Presents efficient algorithms for finding convex hulls and Delaunay triangulations in generalizations of Euclidean space called CC systems (``counter clockwise systems'') and CCC systems. Joseph O'Rourke: Computational geometry in C. Cambridge UP 1994, 370p. 0-521-44592-2 (pb.). £17.