The Importance of Being Earnest

Probably one of the best books (or plays) I've ever read. Wilde's style is infectiously delightful, and almost every paragraph had me in splits. His grasp of the very upper class he was later part of for a while is unparalleled, and the satire is all the more perfect for it. The characters are a blast, the story's premise is so ludicrous that it reads like a Bollywood masala movie (except infinitely better), and the ending is such a cute one too!
It's such a short and simple read that I'd recommend this to anyone of any age, no matter what your preferences in reading are.