I just started re-reading Neuromancer by William Gibson, and I might start reading The City We Became by N.K. Jemisin alongside it.

I'll second Harry Harrison, and specifically recommend Bill the Galactic Hero.

Jack Handey's short stuff is probably his most famous work, but he also wrote a novel called The Stench of Honolulu.

John Swartzwelder is another comedy legend, he wrote nearly 60 episodes of The Simpsons, and he has a series of detective-pastiche novels (maybe novellas), starting with The Time Machine Did It.

I like these books and think they're along the same lines as Pratchett and Adams, but they are distinctly sillier.