The IRIS2 Observing Manual is a comprehensive guide to using IRIS2. If you simply want to know the basics of IRIS2, then you only need to read part I. If you are unfamiliar with observing in the near-IR or you are preparing for a run with IRIS2, then read part II. Once at the telescope, read part III. Data processing is described in part IV and common problems and their solutions are described in part V.