Linda Maloney has served English-speaking students of the Pastorals by providing in CBQ a summary and review of Michael Theobald, Israel-Vergessenheit in den Pastoralbriefen: Ein neuer Vorschlag zu ihrer historisch-theologischen Verortung im 2. Jahrhundert. n. Chr. unter besonderer Berücksichtigung der Ignatius-Briefe (Stuttgarter Bibelstudien 229. Stuttgart: Katholisches Bibelwerk, 2016). For Maloney, “this book is a mine of precious information and analysis.” You can find the first page of the review here.

Within the last year, Mark Harding has posted a positive review at RBL of T. Christopher Hoklotubbe, Civilized Piety: The Rhetoric of Pietas in the Pastoral Epistles and the Roman Empire (Waco, TX: Baylor University Press, 2017). (full review available to SBL members only)

On RBL’s site, I note there are four volumes of interest up for review by SBL members:
(1) The just-published dissertation by Nathan Nzyoka Joshua, Benefaction and Patronage in Leadership: A Socio-Historical Exegesis of the Pastoral Epistles (Carlisle, Cumbria, UK: Langham, 2018).
(2) Jermo van Nes’s recent dissertation, Pauline Language and the Pastoral Epistles: A Study of Linguistic Variation in the Corpus Paulinum (Linguistic Biblical Studies 16; Leiden: Brill, 2018).
(3) Larry J. Perkins, The Pastoral Letters: A Handbook on the Greek Text (Baylor Handbook on the Greek New Testament; Waco, TX: Baylor University Press, 2017).
(4) Robert W. Yarbrough, The Letters to Timothy and Titus. Pillar New Testament Commentary (Grand Rapids: Eerdmans, 2018).