Frames and Locales

From the reviews:"The book covers, in a comprehensive and self-contained way, the development of point-free topology in the last 30 years ... . The book ends with two short appendices containing those facts about partially ordered sets and categories needed in the book. In conclusion, this is a very good book; it is nicely written and is highly recommended for anyone wishing to gain an overview of point-free topology." (Javier Gutiérrez García, Mathematical Reviews, Issue 2012 j)"The book starts with a recount of sobriety and the TD-axiom, which is then quickly followed by the definition of the category of locales, various facets of spectra, the usual adjunctions and several criteria for spatiality. ... this book is an erudite account of the current status of pointfree topology, written beautifully in the authors' inimitable style. It is both easily accessible to a complete beginner, and an excellent source of reference for the mature pointfree practitioner." (Themba Dube, Zentralblatt MATH, Vol. 1231, 2012)"In a total of fifteen chapters the reader is taken from spaces and lattices of open sets, through a thorough discussion of the notions of frames and locales ... . book ends (modulo its appendices) with a discussion of localic groups ... together with frames, that's what this entire book is ultimately all about. ... is quite-well written: it's a clear and thorough treatment of what is really rather an important subject, which is to say, a greatly underappreciated one." (Michael Berg, The Mathematical Association of America, April, 2012)