Search the web for:
This search will find documents on school, college and university websites.

You can find:
  - Hidden caches of books
  - Academic Papers
  - Resumes
  - Course prospectuses
 
PDF Files (Adobe Acrobat)This is the most common format for ebooks. Google Custom Search
CHM FilesMany ebooks appear in CHM format.
To find out more about how to read a CHM file, click here.
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DOC Files (MS Word)Microsoft Word Files.
Sometimes you can find books in this format.
 
  RTF Files (Rich Text) A lot of documents in this format.  
  TXT Files (Plain Text)When all else fails... try this.