Elle Fanning Dives into Olive's Ocean

The adorable Elle Fanning (sister of Dakota) has just signed on to play the part of Martha in the screen adaptation of Olive's Ocean by Kevin Henkes. Elle played Lily in We Bought A Zoo. She was very sweet as the young love interest for Colin Ford  - Matt Damon's son in the film.
The news reports about the film claim the book is Young Adult but on Amazon they cite it as a 5th-8th grade reader.
It sure sounds like its for younger readers based on its description at Barnes and Noble which I've included below. If you've read it and have a different point of view please let me know.

I 'll be interested to see how they make and market this one!

Sometimes life can change in an instant

"Martha Boyle and Olive Barstow could have been friends, but they weren't. Weeks after a tragic accident, all that is left are eerie connections between the two girls, former classmates who both kept the same secret without knowing it. Now, even while on vacation at the ocean, Martha can't stop thinking about Olive. Things only get more complicated when Martha begins to like Jimmy Manning, a neighbor boy she used to despise. What is going on? Can life for Martha be the same ever again?

A 2004 Newbery Honor Book"