Collecting Buffy the Vampire Slayer Season Eight #6-10.
*When a rogue debutant Slayer begins to use her power for evil, Giles is forced to recruit the rebellious Faith, who isn’t exactly known for her good deeds. Giles offers Faith a clean slate if she can stop this snooty Slayer from wreaking total havoc--that is, if Buffy doesn’t beat her to it. *Source: darkhorse.com