Cygwin one-liner to grab all free ebooks from O'Reilley
curl 'http://www.oreilly.com/programming/free/' | grep '\.csp' | sed -e 's/^.*href="//' -e 's/free\/\(.*\).csp.*"/free\/files\/\1.pdf/' -e 's/.$//' | tr -d '\r' | xargs wget