Knots and Isotopies Geometric Concepts Knot Groups Commutator Subgroup of a Knot Group Fibred Knots A Characterization of Torus Knots Factorization of Knots Cyclic Coverings and Alexander Invariants Free Differential Calculus and Alexander Matrices Braids Manifolds as Branched Coverings Montesinos Links Quadratic Forms of a Knot Representations of Knot Groups Knots, Knot Manifolds, and Knot Groups The 2-variable skein polynomial Appendix A: Algebraic Theorems Appendix B: Theorems of 3-dimensional Topology Appendix C: Tables Appendix D: Knot Projections List of Authors According to Codes List of Papers According to Codes Glossary of Symbols Author Index Subject Index