The Languages of Native North America is still the classic introduction to North American languages. Although more work has been done, the basics haven't changed.
https://www.amazon.com/Languages-America-Cambridge-Language-Surveys/dp/052129875X
Of course, you'll need something more specific for a paper topic - just listing information isn't a good approach to a paper. Also, it's not particularly productive to look for sources until you've come up with something more specific. There are a lot of sources on Native American languages out there, and what's useful to you will depend on your topic.
Have you seen Marianne Mithun's book? If not, it's worth a read: https://www.amazon.com/Languages-America-Cambridge-Language-Surveys/dp/052129875X. For Polysynthesis, see Part 1, Chapter 2.
Pirahã is fairly analytic. While there are a good amount of suffixes that mark modality and aspect, there are no agreement patterns and those suffixes (I think) only have distribution in VPs. See The Handbook of Amazonian Languages vol. 1, 1986 for details. In addition, Mithun 1999's The Languages of Native North America reports that many of the Inuit trade pigeons were/are analytic.
Pirahã is fairly analytic. While there are a good amount of suffixes that mark modality and aspect, there are no agreement patterns and those suffixes (I think) only have distribution in VPs. See The Handbook of Amazonian Languages vol. 1, 1986 for details. In addition, Mithun 1999's The Languages of Native North America reports that many of the Inuit trade pigeons were/are analytic.