(W) Joss Whedon (A/CA) John Cassaday. Written by JOSS WHEDON Penciled by JOHN CASSADAY Cover by JOHN CASSADAY Strap yourselves in* folks! It's Joss Whedon and John Cassaday's final arc on Astonishing X-Men! After the shocking and brain-smashing events of recent issues* the X-Men are off to protect the Earth from its destruction at the hands of the Breakworld. And when it's all over* nothing will ever be the same! No* really* we mean it! Whedon and Cassaday prove they are more than Astonishing: They are unstoppable! Collecting ASTONISHING X-MEN #19-24 and GIANT-SIZE ASTONISHING X-MEN #1. 192 PGS./Rated T+ ...$19.99 PRODUCT UPDATE (052808): The Astonishing X-Men TP Volume 4: Unstoppable will be 200 pages* not 192 pages.