Dear Michael, In relation with "Category Theory for the Sciences", I would mention the amplications of category theory I have been developing since more than 25 years to the modeling of multi-scale living systems, such as biological, cognitive and social systems. Cf. my book with Jean-Paul Vanbremeersch "Memory Evolutive Systems: Hierarchy, Emergence, Cognition", Elsevier 2007 and for more recent papers my site http://ehres.pagesperso-orange.fr This work is partially based on an extension of sketch theory, leading to a characteization of the properties necessary for 'real' emergence. Among the applications: model MENS for a neuro-cognitive-mental system, from the neural level to mental processes, analyzing the emergence of higher cognitive processes up to consciousness, anticipation and creativity. Kind regards Andree [For admin and other information see: http://www.mta.ca/~cat-dist/ ]