I would like to post the following annoucement for your category theorists. Galois Theories by Francis Borceux and George Janeldize Starting from the classical finite-dimensional Galois theory of fields, this book develops Galois theory in a much more general context. The authors first formalize the categorical context in which a general Galois theorem holds, and then give applications to Galois theory for commutative rings, central extensions of groups, the topological theory of covering maps and a Galois theorem for toposes. The book is a hardback, 360 pages, and costs $74.95 (50.00 in UK). For more information about the book, or to order a copy, please visit www.cambridge.org. Please let me know if you need additional information from me Thanks, Cathy -- Cathy Siddiqi Marketing Associate Cambridge University Press 40 West 20th Street New York, NY 10011 212-924-3900 x323 212-691-3239 fax