"Version: 20171001"--Title page verso."A Morgan & Claypool publication as part of IOP Concise Physics"--Title page verso.Includes bibliographical references.1. Introduction -- 1.1. What is a halo? -- 1.2. Examples of halo nuclei -- 1.3. Experimental evidence for halos -- 1.4. The three phases of halo studies2. The structure of halo nuclei -- 2.1. One-neutron halos -- 2.2. Three-body systems--th…