If you're like me, you read these novels as a youngster in the late 50's or early 60's, and you were drawn in not just by the no-wasted-motion adventure/scifi style for which Ms. Norton became so well loved, but by the glimpses of a not-too-distant future that was clearly based on a somewhat uncertain present. The style is still there in this new edition, but the future, sadly, is gone. For reasons that elude me, the political/cultural milieu of the original near-future has been updated (the Bad Guys are no longer "Reds," they're from a post-USSR-breakup "resurgent Russia"), and the result is not a good fit. The narrative and characterizations still have that squeaky-clean Fifties feel, so the 90's references feel anachronistic. Part of the pleasure of reading classic sf is to enjoy the retro flavor; this attempt to overlay a contemporary veneer simply rings false. What's worse, the paperback edition, which I purchased, bears no indication anywhere that these revisions exist. I discovered them only as I read along and became increasingly disturbed by things that didn't fit. If you want to read a classic, and especially if you want to relive the experience of reading the classic you remember from your youth, do yourself a favor and track down the original text.