Acts is the second volume of a story that has no end - the story of the Christian church.
It was written by Luke, a doctor and the only gentile New Testament author, who was a most valued helper and most loyal friend of Paul. Vocabulary, grammar and style are not only consistent throughout Acts, showing that is a literary unity, but they are also characteristic of Luke's gospel. There are also the stories from Paul when they were in prison together. In the Greek there is no 'The' before Acts. The correct title for the book is 'Acts of Apostolic Men', giving us a series of typical exploits and adventures of those great heroic figures of the early Church.