Though he has not publicly aligned himself with a specific denomination, he has cited one early influence as Joyce Meyer, prior to her international notoriety.
He has also stated he incorporates speaking in tongues and other characteristics commonly associated with the Charismatic Movement.
In fact, he credits his years in information technology as providing the framework for constructing his novels.
As an author, Herrick stresses vulnerability as he constructs characters and events.
Often, he incorporates faith-related angles into his novels, such as spiritual journey (From the Dead, 2010) and homosexuality (Between These Walls, 2015).