The document discusses different sources for obtaining images, including books, Google Images, stock image libraries, copyright free sites, and taking your own photos. It outlines the advantages and disadvantages of each source. For example, books provide reliable images without an internet connection but images must be scanned, while Google Images offers a vast selection online but images are only available digitally. The document also covers processing images, such as cropping, scaling to different sizes, and using different resolutions for print versus web. Manipulating images through techniques like multiple exposure is described as well.