Some Basic Group Theory.- The Basic Theory of Polycyclic Groups.- Some Ring Theory.- Soluble Linear Groups.- Further Group-Theoretic Properties of Polycyclic Groups.- Hypercentral Groups and Rings.- Groups Acting on Finitely Generated Commutative Rings.- Prime Ideals in Polycyclic Group Rings.- The Structure of Modules over Polycyclic Groups.- Semilinear and Skew Linear Groups.