Walton Weaver has done a good work in his commentary on 1 & 2 Thessalonians. Those who want a better understanding of these two books of the Bible will gain much from his writing.
I have found this commentary on 1 and 2 Thessalonians to be very helpful especially regarding the history behind the church in Thessalonica and Paul's association with this church.
You will find this commentary to be imminently useful in your exploration of these two Pauline letters. Weaver is an excellent writer who strikes to the heart of all the important issues related to a full understanding and appreciation of these biblical documents. But this book and use it!