[nicollo]

I would add Upton Sinclair's "The Jungle."

Hear hear! And I'm glad to see Croly's The Promise of American Life on the list. A truly awful book -- and the very favorite of Harvard's Samuel Beer (who wrote "To Make a Nation.") For those who don't know, Croly penned the phrase "New Nationalism" and founded The New Republic.

If Croly's book is there, so, too, should be Charles Beard's Economic Interpretation of the Constitution of the United States, which was more influential than Croly's The Promise, and just as pernicious. Not a lot of good political science out of the Progressive Era. For an antidote, read Taft's Popular Government (amazon.com link)

[WOSG]

FWIW, the books you mentioned are on this other longer list of bad books of 20th century:

http://sydneyline.com/Intercollegiate%20Review%20selection.htm

I got to read some of Beard's stuff in HS history.
Phew, I survived.