Sober Faith (Payton Skky Series, 2) by Stephanie Perry Moore

Payton Skky and her girlfriends are in their senior year at their Georgia high school and loving every minute of it. But the rest of Payton's crew has strayed from God and continues to make bad decisions. While chasing after a good time, her friends begin experimenting with alcohol, drugs, and sexual sin. How can Payton help her girls turn toward God and away from those sins? Can she resist her own impulses to try things she knows are against God's will? See if Payton discovers how to show her friends that true faith is sober faith.