I have a 5th, 6th and 7th... but my favorite is the 3rd edition.
I have read the third edition so many times the original cloth cover has disintegrated, the rest of text in this 3rd edition is tightly bound and intact except the last page 149 that's missing. The 149 last page is the some table of contents. If anybody has a third edition and would be willing to copy the last page for me I would greatly appreciated it, and be glad to pay for it.