This book will appeal to girls who love fairies and fantasy.  Ali has the perfect sister whom their parents praise and she will  do anything to get the attention she thinks she deserves.  She signs a contract agreeing to raise 100 fairies, recruit another child to so the same, in return for one wish.  Right there Ali should have seen a red flag:  100 for one?  Not fair.  But Ali sees no problem, until it is.  The fairies turn out to be lots of work and lots of trouble, all for one wish.