After 10 years in business, Minneapolis-based self-publishing company Hillcrest Media has been sold to Salem Media Group Inc. Camarillo, Calif.-based Salem Media owns various radio stations, magazine and book publishers with Christian and conservative target audiences. It bought Hillcrest, which has $5 million in revenue and about 30 employees, for $3.5 million on Aug. 1. Hillcrest founder and CEO Mark Levine will exit the company Aug. 31. The sale comes as Salem Media tries to expand its self-publishing...