All 208 folios (416 pages) of Codex Ephraemi can be viewed online on the website of Gallica, the digital library of the National Library of France. If you go to the “view” symbol (third item down on the left) and click on the box with nine squares in the window that opens, you can view thumbnails.
Codex Ephraemi is difficult to read because the original fifth-century Greek manuscript of the entire Bible was washed off and a Greek translation of the sermons of Ephraem the Syrian were written over it. When you look at the codex, you will realize why the world’s finest scholars were not able to decipher the biblical text until Constantine von Tischendorf successfully read the text and spent two years copying what he read. Moreover, not all of the original manuscript currently exists. It contains material from every New Testament book except 2 Thessalonians and 2 John and it contains only six books of the Septuagint Old Testament.