Wikisummaries
Encyclopedia
Wikisummaries is a wiki
Wiki
A wiki is a website that allows the creation and editing of any number of interlinked web pages via a web browser using a simplified markup language or a WYSIWYG text editor. Wikis are typically powered by wiki software and are often used collaboratively by multiple users. Examples include...

 containing summaries of books.

It has sections for books in English (about 3,000 in 2011) and Spanish (only 9 in 2011).

It uses MediaWiki software and the GNU Free Documentation License
GNU Free Documentation License
The GNU Free Documentation License is a copyleft license for free documentation, designed by the Free Software Foundation for the GNU Project. It is similar to the GNU General Public License, giving readers the rights to copy, redistribute, and modify a work and requires all copies and...

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The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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