Author Charles Keltz of Summerville will sign copies of his book “Interstellar Pursuit” beginning at 2 p.m. Saturday at the Single Smile Cafe, 100 S. Main St., Summerville.

The book follows a group of post-apocalyptic Christians forced to earn their salvation in an interstellar quest.

For more information, call 877-727-0697 or email Michelle Whitman at michelle@keymgc.com.