The Project Gutenberg texts are formatted with fixed line lengths, rather than as logical paragraphs. You'll need to do a little reformatting to get them to read well on your Sony.
First - check the ebook forums here to see if someone has already done a good conversion.
If not - check to see if there's an HTML version at Projewct Gutenberg - this will almost certainly work better than plain text
If you must - open the text up in a text editor, and do a few global search and replaces:
(1) search for two new line characters in a row, and replace with "[paraend]"
(2) search for any new line character, and replace with a space
(3) search for [paraend] and replace with a new line character
(4) search for two spaces in a row and replace with a single space.
That should make your reading experience a lot better.
Originally Posted by levi_john
When I download books from Project Gutenberg onto my Sony PRS505 the text often does not fill the full width of the page. For example one line may be the full width ,whilst the next line down might only have one word on it and then the next line down will again be the full width. I can read it like this but clearly it is not right. Can anyone help