define "celebrate". i know books that make it a point that we exist, but typically those books are existentialist and are pretty depressing and i wouldnt say they celebrate existence. if anything, they do a great job acknowledging thats existence exists.
Read Nausea by Sartre btw
Look into the transcendentalists, OP. Hell, just read Emerson's essays.
>OH BOY, EVERYTHING IS GREAT! THAT TREE IS SO GREAT! I'M THAT TREE AND THAT TREE IS ME AND WE'RE BOTH GREAT TOGETHER! GOD I FUCKING LOVE TREES! GOD I LOVE GOD, AND ME! ALSO I'M GOD!
Childhood's End. Is so bitter sweet. It treats us like we are something special in a universe where everything dies in the annals of time. The ending always gets me; the Earth is destroyed and forgotten about for the rest of time but man lives on forever as part of a God-like conscious whilst the Overlords live on for eternity forever trapped in eternal life.