Punny SF/F Trivia

So I returned to my local SFF book club after 3 months away, only to stumble directly into their end of year holiday potluck. Went home with Several leftovers, which was great, but more importantly one of the librarians who ran the club hosted a deeply funny and challenging trivia game. I ended up stealing his notes afterward (with permission), because there was one section that was entirely based on contrived puns of SFF book titles and I wanted to inflict them on everyone who stood still long enough.

The question format was a hypothetical news title that you had to reduce down to the book title it came from. For example: "Beyonce in prolonged battle with Cher" -> "Star Wars"

Here are the questions, I'll put the answers below the cut. Feel free to guess in the comments!

1. "Blizzard causes fifty car pileup"
2. "Classic magazine to be published with rippled cover"
3. "Leno now a subject of derision"
4. "Mathletes are now famous people"
5. "The Planet has become Amazon" (the self-proclaimed most difficult one)

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( Answers below... )