Collection of eBooks:
Gale Virtual Reference Library (collection of many eReference books) look inside specific titles such as American Decades (search on your key term and then select proper decade from results) or Bowling, Beatniks, and Bell-Bottoms (select correct decade from dropdown menu on right of that page).
Salem Press History - ebook collection
History Resource Center U.S. (contains a broad collection of eBooks as well as periodicals and primary sources)
Literature Resource Center - (biographical material on authors; overview and specific material on particular titles)
eMagazines and eNewspapers: