I've included here books (and some web sites) on elementary particle physics that I am familiar with. This list is by no means complete. I've compiled this list to aid those who are looking for sources other than the class text. For some of the references I include a summary and opinion. The summaries and opinions are solely mine.
Books in the beginner category are aimed at a general audience. Their level of mathematics ranges from none to basic calculus. A general picture of the state of the field of elementary particle physics can be gleaned from these books.
Books in the intermediate category are aimed at advanced undergraduate physics students and physics graduate students. They generally assume an understanding of undergraduate mechanics, E&M, and quantum mechanics. These books are appropriate for Physics 7060 students.
Books in the advanced or specialized category are aimed at advanced graduate students and beyond. They assume a good understanding of graduate level physics. Some of the these books also assume knowledge in a particular specialty. Students may find these useful for more advanced work.