This book is an excellent collection of technical papers for the professional or advanced amateur. It's sort of a snapshot of the forefront of ornithopod (e.g. Iguanodon, duckbilled dinosaurs, horned dinosaurs) paleontology.
If you don't have a background in paleontology, you'll most likely be happier reading other material. On that note, here are some of my recommendations for easier, less-technical reading that anyone can be happy with: Peter Dodson's "The Horned Dinosaurs"; Farlow and Brett-Surman's "The Complete Dinosaur"; Czerkas and Olson's "Dinosaurs: Past and Present (Vol. 1-2)"; Greg Paul's "The Scientific American Book of Dinosaurs." The first in that list is the only one with a single author (and the only one that really needs to be read straight-through). The rest are collections of stand-alone articles that shouldn't have the reader seeking an outside reference. Also, those compilations include topics beyond just ornithopod dinosaurs. All of those are rather well-illustrated; "Dinosaurs P & P" is the best along those lines. Since Dodson's book is the only one I mentioned as a straight-through read, I feel compelled to mention others, though off-topic: I believe Michael Novacek's "Dinosaurs of the Flaming Cliffs" and "Time Traveler" and Peter Ward's "Gorgon" are all excellent.