Soviet revision of texts

[Rooster]

I like buying books, especially second hand books (and even more so when the cost me peanuts and I can help out a local book store). Obviously I'm interested in getting some texts of Marx and such but I was wondering if the practice of revising texts is true and to what extent. Tony Cliff mentions an example about Lenin being changed, so I'm a bit apprehensive about getting these books if they're not the complete package. Is there like a guide to this? Were books edited in certain decades (like, were they corrected after the secret speech)?

[x359594]

...Were books edited in certain decades (like, were they corrected after the secret speech)?

Certain works by Lenin were redacted before Khurschev's speech to the 20th Party Congress and published unexpurgated in following years.