The book is about when a kid finds out his dad is a fairy, maybe some important political figure. So he goes to Fairyland. Apparently, in Fairyland, no one wears clothes.
Could this be Magicalamity by Kate Saunders?
Tom is in shock. He's just discovered that his dad is an escaped fairy on the run. And that he must trust his life to three dangerous fairy godmothers he's never met. Two of them are hardened criminals, and one falls out of the window when she tries to fly . . .
Will their mad magic be enough to help Tom rescue his dad from the clutches of some killer fairies?