Literature & Languages Guide: How to find a plot summary
Although the library does not subscribe to this series, there are some plot summaries available for free on
the Cliffs Notes website.
Gale Group's Free Resources: Synopsis of Selected Literary Works
Plot summaries for about 35 major African American literary works.
Masterplots Series
EKSTROM Reference Desk, various call numbers
Included are American Fiction Series, African American
Literature
Series, Drama Series, Nonfiction Series, Short Story Series, World
Literature, Poetry, and more. The works within each series are ordered
alphabetically by title and included are summaries of the plot,
characters, and short critical analysis.
Readers' advisory resource which assists fiction readers in finding new authors and titles. It is searchable by title, author or simply by describing a book they would like to read. Includes full-text of reviews. (EBSCOhost) 
Barnes & Nobles' version of Cliffs Notes. Lots of free material online. Cost is incurred if you want to
print or download the whole thing.