If you are interested in learning more about biblical theology, here are a few suggested books. (As with all books that I link to or recommend, this does not mean that I agree with everything in the book.)
New Dictionary of Biblical Theology edited by T. Desmond Alexander
Introductory articles about the various natures and methods of biblical theology, plus articles are various books of the Bible and themes in Scripture.
Biblical Theology: Retrospect and Prospect edited by Scott J. Hafemann
Various authors views of the state and future of biblical theology.
Central Themes in Biblical Theology: Mapping unity in diversity edited by Scott J. Hafemann and Paul R. House
Examples of studying various themes in Scripture.
Biblical Theology: Old and New Testaments by Geerhardus Vos
Classic text on biblical theology of the Old and New Testaments.
Biblical Theology: A Proposal by Brevard Childs
Suggestion by Childs that biblical theology should begin with the canon.
There are other good books about biblical theology and other good biblical theologies. I’ll provide links to those in future posts.