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.  
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.