- A bound copy of this book (in case you are reading it online and
want a paper copy you can carry with you) can be purchased here:

http://www.lulu.com/content/1144184http://www.lulu.com/content/1144184 - Another excellent online textbook is Orfanidi's
*Electromagnetic Waves and Antennas*:

http://www.ece.rutgers.edu/ orfanidi/ewa/ - The ``classic'' textbook of Electrodynamics is J. D. Jackson's,
*Classical Electrodynamics*, 3rd ed. It is fairly encyclopedic, but the material it presents focuses on things that are less important, such as boundary value problems with obscure Green's functions, at the expense of multipolar methods and other approaches that treat systems of charge-current density with no actual boundaries (such as atoms). It also has a tendency to present a formula, then say something like ``and from this it can be shown that'' and present a second formula, omitting the*four pages of difficult algebra*connecting the two. This can be hard on students (and instructor), although there is no denying that any student who can fill in the four pages will have learned something. - H. Wyld,
*Methods of Mathematical Physics*, ISBN 978-0738201252, available from e.g. http://amazon.comhttp://amazon.com. Other mathematical physics texts such as Arfken or Morse and Feshback are equivalently useful. - Donald H. Menzel's
*Mathematical Physics*, Dover press, ISBN 0-486-60056-4. This reference has a very nice discussion of dyads and how to express classical mechanics in tensor form, which is actually quite lovely. - There is a fabulous complex variable/contour integration reference
by Mark Trodden at Syracuse here:

http://physics.syr.edu/ trodden/courses/mathmethods/http://physics.syr.edu/ trodden/courses/mathmethods/

This online lecture note/book actually works through the Euler-Lagrange equation as well, but stops unfortunately short of doing EVERYTHING that we need in this course. It is only 70 pages, though - probably unfinished. - Introduction to tensors by Joseph C. Kolecki at NASA:

www.grc.nasa.gov/WWW/K-12/Numbers/Math/documents/Tensors_TM2002211716.pdfwww.grc.nasa.gov/WWW/K-12/Numbers/Math/documents/Tensors_TM2002211716.pdf - Short review of tensors for a Berkeley cosmology course:

http://grus.berkeley.edu/ jrg/ay202/node183.htmlhttp://grus.berkeley.edu/ jrg/ay202/node183.html - Short review of tensors for a Winnipeg University cosmology course:

http://io.uwinnipeg.ca/ vincent/4500.6-001/Cosmology/Tensors.htmhttp://io.uwinnipeg.ca/ vincent/4500.6-001/Cosmology/Tensors.htm - Wikipedia:

http://www.wikipedia.orghttp://www.wikipedia.org Wikipedia now contains some*excellent*articles on real graduate-level electrodynamics, relativity theory, and more. The math and science community are determined to make it a one stop shop for supporting all sorts of coursework. I*strongly recommend*that students use it to search for supporting material for this course, or to find a neat and usually well-written explanation of things when this text fails them. - Mathworld:

http://mathworld.wolfram.comhttp://mathworld.wolfram.com This site, too, is very good although some of the articles tend to be either thin or overly technical at the expense of clarity. - (Google Is Your Friend). When looking for help on
*any*topic, give google a try. I do. It is quite amazing what people put up on the web, for free.