"Read it - it's special in all kinds of ways - but try to remember it in May, when the bluebells are flowering" Joanne Harris.
She liked it a lot! And so did I. A girl taken by fairies who manages to return. What would you think if a family member disappears, leaving no clues at all. Like the police you would call that missing presumed dead - except that she isn't; for twenty years later she returns to her family, thinking that she has only been away for six months. Tara is home - and for her parents it's a mixed blessing. For her brother and his family the same. For her boyfriend, left bereft (and accused of the crime - what crime? - at the time) time has stood still and now she is home for him to love.
Told by (or about) each major character in turn, you will learn what results her disappearance had on those who loved her, and what occurs now that she is back. Life is not the same, for in those twenty years people have grown older, but Tara has not, neither in body or looks. In her head she has learned many things which may be of no help at all in the real world. And the thing is, no-one really believes her fairy story.
NB. I have read some Amazon reviews, where readers are offended by swear words and sexual descriptions..... there are not many of those, and perhaps those readers were looking for a "real" fairy story. The title rather gives the game away, no?