Jerry Pournelle and Larry Niven. I'm surprised none of the woke sci-fi readers have found stuff in there to cancel. The authors' equating of the bolide with a giant sundae or whatever was amusing. I read it in the early 1980s I think, after I'd read "Ringworld", and probably wouldn't enjoy it now, because I'd be nitpicking the authors' rather poor grasp of the seriousness of such a large impact. That was one of the last fiction books I read (the only ones I've done since then have been audiobooks of Clive Cussler -- I suggest getting the abridged versions if available -- a re-read of LOTR before the movies came out, and a FReeper-recommended "Inherit the Stars" by, uh, last name Hogan I think.
I don't think they downplayed the seriousness one little bit.
I have read alot of Larry Niven. I liked Asimov too. Couldn,t get into Jerry,s stuff much.