Well, I have not read this e-book because I don't need to! E.E. (Doc) Smith's lensman series of six volumes have sat on my bookshelf for many years now and the first five volumes have been read and re-read frequently. They form a magnificent (though now understandably dated) space opera. The entire detailed story of the breeding program of the Kinnisons which eventyally ended the evil designs of the Eddorians reached its stunning conclusion at the end of volume 5. This volume I only needed to read once. It is a poor attempt by Smith to capitalise on the popularity of the first five volumes by writing an add on. It doesn't work! Others have subsequently done a much better job, writing in Smith's style filling in and amplyfying parts of his main story line. As it is now a free download, I suppose it is worth a read for interests sake - I had to buy it! Read the first five volumes first and enjoy them!