I’m a huge Pournelle fan. I’ve been reading him since the late 70s when he was a Byte magazine columnist, and am a patron to his blog / web page today. Him and Free Republic are the only two sites I send money to like that.
I also read Lucifers Hammer by the same two, but it was so long ago, all I remember are the titles they were so unusual. I then got into reading all of Louis L’mour books and really got upset when he up and died. Most excellent stories of the old west and he was a great story teller.