Send me a personal message and I can send you more, but here are some leads for starters...
Start with "When in the Course of Human Events" by Charles Adams - good overview. Then go to website www.crownrights.com (he sells inexpensive reprints of out-of-print historical books) and read "The American Union" by Spence, and "A Republic of Republics" by Sage, and "Americas Caesar" by Duran. For lighter reading, read 'The South was Right' by Kennedy (they get a little hot-headed, but there are many references to other books contained within and what they say is well-documented).
Let me know how it goes.
Amazon probably has it.