One of my favorite books is Jefferson and Monticello by McLaughlin. No politics just the fascinating story of TJ designing, redesigning and building Monticello. You will learn a lot about 18th century living. Again an all time favorite.
The Jeffersons of Shadwell by Kern focuses on TJ as a youth and growing up before Monticello. Given all the Sally Hemings b.s. it is interesting that the Hemings never even get mentioned.
This one isn't purely TJ. It is Burr, Hamilton and Jefferson by Kennedy. It is a very good character study.
Lastly, before you get drug into the Hemings fiasco, read Framing a Legend by Holowchak. At least he understands how DNA works, a skill totally foreign to Gordon Reed.
Echo the comments on Malone.