"Astonishing X-Men, Vol. 4: Unstoppable" is a paperback comic book published by Marvel Comics in 2008. Written and illustrated by Joss Whedon and John Cassaday, this issue features a diverse cast of X-Men characters including Dafi, Sylatin, Angel, Beast, Kitty Pryde, and more. The cover art by Laura Martin and John Cassaday showcases the dynamic and action-packed storyline of this modern age comic book series. With a mix of superheroes, villains, and supporting characters, this volume is a must-have for fans of the X-Men universe.