He did a nice job giving the founders realistic personalities of men who sometimes didn't see eye to eye at all but who found a way to make it work in spite of their differences.
In the book Roger Sherman was a weary, older man who saw that the different factions would never get all that they wanted and he set out to forge a compromise path. Madison he portrayed as an idealistic youth opposed to compromise as he felt his plan already was the fairest possible compromise available. The rest of the book is the story of all the back and forth and how each man came to appreciate the gifts of the other. I really enjoyed it.
If you have Kindle Unlimited you can read it for free. I bought during a one-day giveaway; maybe it will be one again someday.