UnBound: Stories from the Unwind World (Unwind Dystology) - Neal Shusterman

Normally I wouldn't review a story collection all that highly, but this felt like such a natural supplement/extension of the series that I barely noticed the format. Shusterman juggles so many characters and perspectives with such excellent transitions in voice, that this prequel/sequel collection felt seamless. Cool world-building backstories seem like a behind-the-scenes peek, while the post-book-4 bits are fun and add a little more dimension. Must-read for fans of the series.