Andreas J. Köstenberger, Benjamin L. Merkle, and Robert L. Plummer. Going Deeper with New Testament Greek: An Intermediate Study of the Grammar and Syntax of the New Testament. Nashville: Broadman & Holman, 2016.
This grammar’s level of detail falls somewhere between Dan Wallace’s lengthy grammar (1996) and his abridgment (2000). That is a happy medium for Greek professors who teach intermediate Greek in just one semester. It is student-friendly, and it is up-to-date on Greek verbal aspect theory and argument diagrams. Highly recommended!
The three authors introduce their book in this 3.5 minute video:
Rob Plummer introduces the book in this 5-minute video:
Fred Zaspel interviews the authors.