The answer is: Luke

Acts 1:1 / Luke 1:3 - showing Acts to be a subsequent work of Luke.

In the grand narrative of the early Church, the author Luke stands as a fascinating figure. The Book of Acts serves as a sequel to the Gospel of Luke, intentionally linking the life of Jesus with the growth of the early Christian community. If you dive into Acts 1:1, you’ll spot the intriguing connection; it reads almost like a bold sequel teaser, referring back to the former accounts Luke has recorded for us.

Consider this: Luke was not one of the twelve apostles or original disciples. Instead, he's described as a physician in Colossians 4:14 and is said to be a companion of Paul during his missionary journeys. This brings a unique lens to his writing; Luke’s background in medicine could influence how he frames miracles and healings—a clear way to stress not just the spiritual implications but a deep understanding of human suffering and hope.

Interestingly, Luke is also recognized for his attention to details and his commitment to documenting history. He weaves the tale of the early church concurrently with the larger tapestry of Roman history, giving us snapshots of encounters with key figures and multitudes clashing and collaborating in the burgeoning movement.

So when you read through Acts, keep in mind that it's not just a historical account—it's Luke painting a vivid picture of growth, intention, and transformation through the persistent work of dedicated individuals following a path lit by embodying teachings of love and inclusiveness.