From the reviews: "The book is truly self-contained, and the reader will appreciate that the proofs of all results, including the most well-known ones, are given in detail. The proposed generalisation of belief contraction and belief revision to classes of logics defined by properties of their consequence relations is a valuable addition to the field, with natural concepts and significant results." (Eric Martin, Zentralblatt MATH, Vol. 1256, 2013)