The Calibre project is essential to me making full use of my SOny ebook reader. I recently wanted to pull down the HTML documentation for Red Hat Satellite server and load it to the reader. It was this simple:
wget -rL http://www.redhat.com/docs/manuals/satellite/Red_Hat_Network_Satellite-5.1.0/html/Installation_Guide/index.html
I probably should have used the -t option to set the title, as I had to rename the file from index.epub.