This book introduces the reader to the field of microwave holography for the specific application of imaging dielectric bodies. The authors first provide an overview of the early works in the area of optical and microwave holographic imaging. Then, more recent developments of the microwave and millimeter wave imaging techniques are discussed which are based on the measurement of both magnitude and phase over an aperture and then implementing digital image reconstruction. The book continues with presenting the developments in the microwave holographic techniques for near-field imaging applications such as biomedical imaging and non-destructive testing of materials. Then, novel techniques to gain super-resolution or quantitative images (images that provide more accurate estimations of the electrical properties of the medium) using holographic techniques are described.