Mexican Genealogy Research Online: A Guide to Help You Discover Your Mexican Ancestry will provide you with a solid foundation to being able to find your Mexican Ancestors online. Practically without leaving your home.
The author, Moises Garza, has created and or edited over 30 publications. They include books, newsletters and journals. Some will help you find resources and learn how to do Mexican Genealogy and others are very specialized to certain localities.
He is confident that no matter what you are looking for, I have a publication that is right for you.