The Kindle Version is acceptable ONLY because it does have both The Sargasso of Space and Plague Ship on it. However, from a careless reading of the very confusing text description, I though all 4 of the Series were on it. The Table of Contents doesn't work worth a darn. Selecting one of the two Books sends you right to the Cover Page (or was it the Title Page?). I still believe the Kindle Books are the greatest thing since Paper. But the Kindle Version of that Series leaves much to be desired!!!