You can upload your ebooks from your computer into your phone using Stanza Desktop easily.
Download Stanza Desktop application from
Download Lexcycle Stanza | Lexcycle
Then
1. Launch Stanza Desktop
2. Go to File->Open,open a book or document in one of Stanza's supported formats
3. Go to the "Tools" menu,ensure that the "Enable Sharing" menu item is checked.
4. Ensure that your iPhone is connected to the same wireless network that your computer is on.
5. Launch Stanza on your iPhone.
6. From the top-level library menu,select "Shared Books".You should see your computer name.Select it.
7. Stanza Desktop will then notify you that your iPhone is attempting to connect to your shared library&request your permission to allow the connection.
8. Once you have granted permission,Stanza iPhone will display a list of books that are open in Stanza Desktop.
9. Tap on the book to download it Stanza on your iPhone.It will appear in Titles&Recent Downloads.