An introduction to Seventh-day Adventists For those who ever wondered who Seventh-day Adventists are and what they believe—this book is the perfect introduction. Originally published as Let’s Get Acquainted; Ken McFarland’s book has been revised and updated to help non-Adventists better understand: How Adventists got started. What they believe. Why they worship on Saturday. What they’re doing to make the world a better place while preparing for the world to come. And much more.