Although the user-level is described as advanced, this book is accessible to anyone interested enough in photography to buy a DSLR.
Starting with an introduction to the various pieces of hardware, it progresses through to exposure, lighting and colour management.
Calibration of camera, computer monitor, scanners and printers is also covered, topics which previously never even occurred to me.
Image manipulation using editing software is then covered in detail, with tips on how to cure common image faults(Photoshop is referred to in most examples, although the same principles apply to The Gimp which I use, as it is available for free).
Having just moved from a point and shoot digital camera to a DSLR, I found this book has given me a good grounding in the basic technical principles of digital photography.