“The explanations are concise and clear; the organization is transparent, so that readers can dip in and out of topics that particularly interest them. … The volume thus serves as a road map or, one could say, a GPS, for those seeking a bird’s-eye view with opportunities to zoom into details of the terrain.” (David Makinson, zbMATH 1458.03001, 2021)

• Motivation.- History.- The AGM Model.- Belief Sets.- Equivalent Characterizations.- Safe and Kernel Contraction.- Criticism of the Model.- Belief Bases.- Iterated Change.- Multiple Change.- Extended Representations of Belief States.- Alternative Operators of Change.- Multiagent Belief Change.- Applications and Connections.- Implementations.- Conclusions.- References.