"Photoresponsive Polymers II" is a technical book that focuses on the development and application of functional polymers that respond to light. Over the past 25 years, a revolution has taken place in this field, leading to the creation of new materials with high functionality. These specialty polymers are significant in many aspects of daily life. Volumes 213 and 214 of the "Advances in Polymer Science" series specifically concentrate on photoresponsive polymers that can either alter the properties of a light beam or adjust their own properties in response to light. The first volume provides an introduction to the fundamentals of two-photon absorption and discusses the structure-property relationships of various molecules. Additionally, it details the applications of these materials in the 3D microfabrication of polymers, metals, and oxide materials. The authors highlight the development of symmetrical and polar conjugated materials and their use as photoinitiators for 3D microfabrication.