Sorry to hear it, but he at least had a good innings.
Odd that one of my favorite of his satirical novels, _Star Smashers of the Galaxy Rangers_ (a spoof of E. E. Doc Smith's books, the _Skylark_ series in particular) didn't get mentioned. _Bill the Galactic Hero_ is a spoof of military SF, _Starship Troopers_ in particular.
The Stainless Steel Rat books would make good material for movies.
Odd that one of my favorite of his satirical novels, _Star Smashers of the Galaxy Rangers_ (a spoof of E. E. Doc Smith's books, the _Skylark_ series in particular) didn't get mentioned. _Bill the Galactic Hero_ is a spoof of military SF, _Starship Troopers_ in particular.
The Stainless Steel Rat books would make good material for movies.