I will soon post a few thoughts about the preaching recorded in Luke's (second volume) Acts. For a primer, I've included what many see as Luke's narrative frame.

The Narrator’s Frame:

Acts 1:1 In the first book, O Theophilus, I have dealt with all that Jesus began to do and teach, 2 until the day when he was taken up, after he had given commands through the Holy Spirit to the apostles whom he had chosen. 3 To them he presented himself alive after his suffering by many proofs, appearing to them during forty days and speaking about the kingdom of God.

Acts 28:17 After three days he called together the local leaders of the Jews, and when they had gathered, he said to them, "Brothers, though I had done nothing against our people or the customs of our fathers, yet I was delivered as a prisoner from Jerusalem into the hands of the Romans…22 But we desire to hear from you what your views are, for with regard to this sect we know that everywhere it is spoken against." 23 When they had appointed a day for him, they came to him at his lodging in greater numbers. From morning till evening he expounded to them, testifying to the kingdom of God and trying to convince them about Jesus both from the Law of Moses and from the Prophets.

24 And some were convinced by what he said, but others disbelieved. 25 And disagreeing among themselves, they departed after Paul had made one statement: "The Holy Spirit was right in saying to your fathers through Isaiah the prophet:
26 "'Go to this people, and say,

You will indeed hear but never understand,

and you will indeed see but never perceive.

27 For this people's heart has grown dull,

and with their ears they can barely hear,

and their eyes they have closed;

lest they should see with their eyes

and hear with their earsand understand with their heart

and turn, and I would heal them.'

28 Therefore let it be known to you that this salvation of God has been sent to the Gentiles; they will listen."
30 He lived there two whole years at his own expense, and welcomed all who came to him, 31 proclaiming the kingdom of God and teaching about the Lord Jesus Christ with all boldness and without hindrance.

What is the significance of this frame? According to Luke, is Paul's gospel other than the one Jesus proclaimed (as recorded in the Synoptics)?