"Biblical Exegesis in the Apostolic Period" 2nd ed. by Richard Longenecker.
This book looks at the exegetical techniques of Jesus, and the Apostles, and other biblical writers.
It explains Jewish exegetical techniques in the 1st century, ranging from Pharisaic to Essene techniques. Longenecker then argues how these techniques were used by the Biblical writers, and how the writers were justified in using the techniques they used.
I found this book very helpful for understanding how the Old Testament is used in the New Testament. Although I didn't agree with all the points made.
Longenecker has an interesting take on Paul's allegory of Hagar. I won't tell you what it is, because that would spoil the fun of reading it for yourself.
One tip, before reading this book, it uses Greek and Hebrew (and some bits of German), so if you can at the very least familiarize yourself with the Greek and Hebrew alphabet, you will be able to follow this book better.
Peace, and Happy New Year!