The answer is: Luke

Luke 1:3 / Acts 1:1 - From these two verses it is reasonable to assume Luke wrote Acts.

The Book of Acts takes us on an incredible journey! This text isn't just an account of early Christians spreading the Gospel; it's rich with excitement, tension, and divine happenings. Written by Luke, the same fellow who penned the Gospel that shares his name, Acts serves as a continuation of that narrative. Think of it like the sequel to a thrilling movie where the heroes face new challenges and adventures.

What’s fascinating is that Luke was likely the only Gospel writer who wasn't one of the twelve apostles, making his perspective significant. As a physician, he brings a meticulous attention to detail that's evident throughout Acts. This book focuses heavily on the work of Peter in the early chapters and shifts gears to Paul, highlighting his missionary journeys and broad audience.

Moreover, the book serves as a historical bridge—not just for religious understanding but for culture, politics, and social dynamics of the time. Did you know that Acts is full of geographical references? It unfolds mainly around the regions of Judea, Samaria, and even all the way to Rome! This journey echoes the wider mission laid out by Jesus in the gospels—spreading faith beyond Jewish bounds.

It's engrossing to imagine the social challenges these early Christians faced, navigating through both Roman rule and varying cultural beliefs while striving for community and unity. The feats and obstacles presented in Acts continue to inspire movements for justice and connection even today!