For our new read aloud, the students were already excited about Wonder.
As a tuning in activity, we linked our knowledge of making inferences and identifying character traits. I scanned the first thirty pages or so of the book, and picked out a few strong examples of voice from August Pullman's narrative. I typed these up and the kids started reading, discussing character traits based on the excerpt, and justifying their inferences.
This took about 20 minutes to prepare, and the kids were really excited to read more about August! This was even before I read the dust-cover teaser, too. We've probably read those first thirty pages together now, and my third graders are completely hooked.