Getting back to the ops initial question, if you search the torrent sites or google for "LRF Gutenberg torrent" you should find a torrent that acidzebra here at MR created using some scripts and Calibre. Ironically, the first link in Google is to an MR post where he announced it but the link to the torrent was deleted in the post

. Anyways, the quality is quite good although the ones you will find here on MR are usually better due to the manual effort taken by individual uploaders.
Since you own a Sony device, this would probably be the best for you as you don't have to bother with doing any file conversions. I found it really useful.