X-Factor Vol. 8: Overtime

Collects X-Factor (2005) #46-50 and X-Factor: Layla Miller. It's Siryn in the fight of her life against the absolute last person that she would have expected to be battling. And Madrox, Layla, and Ruby find themselves under assault by the Sentinels just when they're on the verge of discovering the mystery behind Cortex!