This volume brings together research papers in the field of optical angular momentum. After an introductory section including two of the earliest references on the subject, the book goes on to cover spin and orbital angular momentum, laboratory beams carrying angular momentum and optical forces and torques on particles and atoms. The last two chapters are of particular relevance to current research as thet underpin the technique known as optical tweezing, which is finding application in fields as diverse as atom optics and biology. The remaining sections of the book include papers on...