A careful reader of this blog and other existing accounts of his life will already have the broad outline of TWB's work and its significance. (Indeed, this blog is acknowledged (and recommended) as a useful resource [Thanks, Christie!]). Lowrance's special contribution (beyond putting everything in a cohesive package) is more access to Burgess the man (she draws extensively from his journals and correspondence) and more evidence about his legacy (she interviewed dozens of people [including me], some of whom knew TWB personally). I think she makes a compelling case that Thornton W. Burgess deserves more credit than he currently receives for influencing our relationship with the natural world.
At any rate, it is highly recommended and available through the Burgess Society website.