A book by British author Martin Millar.

After imbibing too much whisky and magic mushrooms, two punk Scottish thistle fairies find themselves lost in New York City, where they befriend Denny, a fat misogynistic slob (who also happens to be the worst fiddle player in New York). Unaware that there is a price on their heads back in Scotland and that armies of fairies are amassing to try to forcibly return them, the fairies cause chaos amongst their fellow winged citizens in America.

A funny and slightly surreal take on Shakespeare's A Midsummer Night's Dream, it's well worth a read if you enjoy sci-fi / fantasy.