The objective of the second volume of the "Handbook of Telecommunications Economics" is to highlight the economic aspects of the evolution of communications technologies beyond the basic fixed-line telephony infrastructure that was covered in Volume 1. In that book, structural, regulatory and competition policy issues with respect to a well-known technology were covered. Yet, technological options have increased in a quantum manner. Fuelled by the creativity of entrepreneurs and policy-makers world wide, it is safe to infer that a process of creative destruction is well underway. Volume 2...