Did I need to read another Jefferson book? Probably not. My fifth in the last two years, though the first traditional biography (the others being guided by conceits or else by Christopher Hitchens and so read to understand him rather than Jefferson).
No. What I need to do and what I have started to do is read Jefferson’s own writings.
It’s a good biography, don’t mistake me, but my interest is in his thinking and as the founder or spiritual godfather of a certain Americans intellectual tradition, not in his use of power. Though, it should be noted that I am not sure that this book actually does all that much to explain Jefferson’s view of the art of power. I think it was settled upon more because it was a cool title than a genuine descriptor of the book’s unique contribution. But an important though not unique note: …we see that Jefferson the practical politician was a more powerful persona than Jefferson the moral theorist. 
In terms of things I gained from the reading, I did appreciate hearing Meacham’s perspective, such as his defense of Jefferson’s behavior as governor of Virginia for a few years during the Revolution.
PS – Happy Father’s Day, everyone.