I'm very pleased to send news about three new publications by authors who are part of the Nexus community.

Paulus Gerdes, whose paper "On Some Geometrical and Architectural Ideas from African Art and Craft" appeared in the book Nexus II: Architecture and Mathematics" rom the 1998 Nexus conference, has just published the color version of his book African Pythagoras: A study in culture and mathematics education. It is available as in print and as a download from: http://stores.lulu.com/pgerdes.

Istvan and Magdolna Hargittai, who participated at the very first Nexus conference in 1996, and published a paper entitled "The Universality of the Symmetry Concept" in Nexus: Architecture and Mathematics have recently published Visual Symmetry. Information is available at: http://www.worldscibooks.com/general/7042.html

Dirk Huylebrouck has published two articles in the Nexus Network Journal: "Curve Fitting in Architecture" (vol. 9, no. 1, 2007), and most recently, with Antonia Redondo Buitrago and Encarnacio Reyes Iglesias, "Octagonal Geometry of the Cimborio in Burgos Cathedral" (vol 13, no. 1, 2011).  Scientific American translated a short version of his paper on Rinus Roelofs’ (also a Nexus auhor) discovery of a mathematical mistake by Leonardo, entitled "Lost in Translation: Leonardo da Vinci's Mathematical Slip-Up". See

Our Nexus community is really productive! Congratulations to these authors!