The Brill translation (except for the latest volume by Danny Schwartz on AJ18-20) is available, including the commentary, for free and open access through the Pontifical Biblical Institute (https://pace.biblico.it/). There is also the newly-published Cambridge New Surveys in Classics (vol 50) which surveys Josephus and his works concisely. In the next few years or so there will be a new translation of the whole corpus with modest interpretive notes from Koren in their Library of the Jewish People. Hopefully in the next few years there will be an orientation to Josephus for Biblical Studies out with Oxford (I've written it, but I'm not sure when it will go to press) as well as a book-by-book guide to the corpus (I'm editing it, but it will be years before it's ready).
Some additional points that might be useful..
The Brill translation (except for the latest volume by Danny Schwartz on AJ18-20) is available, including the commentary, for free and open access through the Pontifical Biblical Institute (https://pace.biblico.it/). There is also the newly-published Cambridge New Surveys in Classics (vol 50) which surveys Josephus and his works concisely. In the next few years or so there will be a new translation of the whole corpus with modest interpretive notes from Koren in their Library of the Jewish People. Hopefully in the next few years there will be an orientation to Josephus for Biblical Studies out with Oxford (I've written it, but I'm not sure when it will go to press) as well as a book-by-book guide to the corpus (I'm editing it, but it will be years before it's ready).
--David Edwards