Can you help me locate this book?

Question

the book is about a world of inventors who all create these important useful things, but one inventor decides to invent something beautiful, something useless that you can enjoy without using, and so he invents the butterfly... I have no idea who the author is or the name of the book..

Answer 1

It sounds like you're talking about about Nathaniel Hawthorne's essay/short story, “The Artist of the Beautiful”

If not; read this book anyway - it's brilliant!

You can get it free here :
http://www.online-literature.com/hawthorne/124/