This book is the latest release in a yearly publication that provides in-depth reviews on topics in experimental theoretical optics, as well as on optical engineering. Chapters in this new release include Phased-array lidar, Holographic metasurfaces, Schlieren imaging, Statistical Properties of Polarization Speckle, The Talbot effect, Space-time optics, Structured light, Application of partial coherence in the quantum domain, Natural mode expansions, and Skyrmionic beams.