i want to download complete pdf format books, how can i do that?

Question

and is it leagel, as i have seen many of my freinds have pdf book,

Answer 1

Yes, that is legal. You'll need acrobat reader and it's free also
. check the links.

http://www.adobe-acrobat.org/default.asp?aff=3

Online books.

http://www.lib.utexas.edu/books/etext.html

http://www.planetpdf.com/free_pdf_ebooks.asp