Review: The Golden Acorn, by Catherine Cooper

From Goodreads:
Jack Brenin's life changes the moment he finds a golden acorn lying on the grass. He gets caught up in an extraordinary magical adventure and enters a world he only believed existed in legend. He's sure he's been mistaken for someone else. He's neither brave nor strong so how could he be "The One" an ancient prophecy speaks about? He's no idea why he's expected to help, unsure if he wants to, or even if he can.

***

Even though this book has had very mixed reviews, I really...