The following book has just appeared with Cambridge University Press: Maria Cristina Pedicchio, Walter Tholen (editors): Categorical Foundations Special Topics in Order, Topology, Algebra, and Sheaf Theory The Publisher's information blurb is at http://us.cambridge.org/titles/catalogue.asp?isbn=0521834147 The book grew out of an exchange and cooperation project ("Atlantis") between two consortia of universities in Canada and Europe. It has eight independently readable chapters, as follows: 1 Ordered Sets via Adjunction (R. J. Wood) 2 Locales (J. Picado, A. Pultr, A. Tozzi) 3 A Functional Approach to General Topology (M. M. Clementino, E. Giuli, W. Tholen) 4 Regular, Protomodular, and Abelian Categories (D. Bourn, M. Gran) 5 Aspects of Monads (J. MacDonald, M. Sobral) 6 Algebraic Categories (M.C. Pedicchio, F. Rovatti) 7 Sheaf Theory (C. Centazzo, E. M. Vitale) 8 Beyond Barr Exactness: Effective Descent Morphisms (G. Janelidze, M. Sobral, W. Tholen)