This book is based on the material presented in four lectures given by
J. Coates at the Tata Institute of Fundamental Research. The original
notes were modified and expanded in a joint project with R. Sujatha. The
book discusses some aspects of the Iwasawa theory of elliptic curves
over algebraic fields. Let E be an elliptic curve defined over an
algebraic number field F. The fundamental idea of the Iwasawa theory is
to study deep arithmetic questions about E/F, via the study of coarser
questions about the arithmetic of E over various infinite extensions of
F.