Just thought I’d mention a great 1 Peter commentary that I made use of when teaching Greek exegesis on that letter: It’s The First Letter of Peter by Reinhard Feldmeier, translated from the German. It quickly became my favourite commentary, because Feldmeier has such a good grasp of what the book as a whole is on about – and this grasp of the big picture helps his section-by-section examination of the letter. He also interacts with Greco-Roman backgrounds with more substance and wisdom than any other commentary I’ve seen on 1 Peter – despite being significantly shorter than Achtemeier or Elliot. He has an intelligent and well-reasoned section on authorship (although I’m not convinced by his tentative conclusion), and to top things off, there’s a little treat for readers who make it through to p248, courtesy of the copy editor. I highly recommend it if you’re looking into 1 Peter.