The book of Acts comes to an anti-climactic end in chapter 28. We never hear about Paul standing before Caesar. There is little conflict from the Jewish leaders there. We never hear whether he made it to Spain afterward. It ends with him living in his own rented home for two years, continuing to share the Good News. The Story does not end here, because the Story is not over. It continues with you and I.
In a sense, Acts ends as it started. It was a continuation of all Jesus began to do through the Spirit — which he now continues through His Spirit at work in his followers.