Marsh introduces graduate students to cluster algebras, which are a kind of discrete dynamical system but also a representation-theory object, combinatorial object, and geometric object. He discusses some aspects that have not been treated in other literature. Where he does not provide proofs, he includes detailed references to more information. He covers exchange pattern cluster algebras, reflection groups, cluster algebras of finite type, generalized associahedra, periodicity, quivers of finite mutation type, and Grassmannians. Distributed in the US by the American Mathematical Society. Annotation ©2014 Ringgold, Inc., Portland, OR (protoview.com)