Each year, the Journal for the Study of the New Testament puts out an issue giving recently-published books in categories related to NT studies. The Pastoral Epistles are a distinct category in the issue each year, and usually garner two or three entries. This year, JSNT highlighted three volumes, each with two-paragraph annotations:
Külling, Heinz. Mann und Frau, Eltern und Kindern als Bewohner ihres Hauses in den Pastoralbriefen. Zurich: Theologischer Verlag Zurich, 2017. (annotation by Peter Oakes)
Perkins, Larry J. The Pastoral Letters: A Handbook on the Greek Text. Baylor Handbook on the Greek New Testament. Waco, TX: Baylor University Press, 2017. (annotation by Tom de Bruin)
Van Nes, Jermo. Pauline Language and the Pastoral Epistles: A Study of Linguistic Variation in the Corpus Paulinum. Linguistic Biblical Studies 16. Leiden: Brill, 2018. (annotation by Dirk Jongkind)