Start with high-confidence american government books, then narrow by subgenre or adjacent topics.
The Paranoid Style in American Politics
Richard Hofstadter, Sean Wilentz
The Small and the Mighty
Sharon McMahon
Inside a U.s. Embassy
Shawn Dorman
US Constitution 101
Tom Richey, Peter Paccone
The Conspiracy to End America
Stuart Stevens
You're More Powerful Than You Think
Eric Liu
The Lemon Tree
Sandy Tolan
A Preface to Politics
Walter Lippmann, Robert Bethune
All We Say
Ben Rhodes
Abundance
Ezra Klein, Derek Thompson