Rebecca Caudill books

I just finished the first book on the Rebecca Caudill award list for this year and loved it. The Mailbox by Audrey Shafer focuses on Gabe, a young orphan who has been adopted by his uncle. One day his reclusive uncle dies suddenly and Gabe decides not to report it. Things get stranger when the body disappears and Gabe begins receiving mysterious notes. Although this is hard to believe, Gabe keeps the secret for over a month before his uncle's body is discovered. Do things end up well for Gabe-read and find out!