Warbler Guy, where can I read about multiple warblers' nesting habits, warbler migration patterns, warbler songs, etc.?

Syd, you cannot go wrong by visiting:

http://bna.birds.cornell.edu/bna/

This site features a comprehensive list of more than 720 North American species, with all of this area's Parulidae (warbler family) members present.

Yes, it costs money: $42 per year or $100 for three years.

Cannot recommend it enough.