Three books in one:
A Short Syntax of New Testament Greek
The Elements of New Testament Greek
Key to the Elements of New Testament Greek
Most Greek grammars can be classified as either reference grammars or learning grammars. Reference grammars organize information by topic, and attempt to provide an overview of the language in outline format. Learning grammars are organized with the needs of the student in mind; single topics might be broken up across several lessons to introduce concepts gradually, with each chapter building on the one before.
H.P.V. Nunn's Short Syntax of New Testament Greek is a reference grammar for beginning and intermediate Greek students. It includes two appendices of Greek readings.
Nunn's Elements of New Testament Greek is a learning grammar, designed to be used as a first year Greek textbook, or for self-study. It consists of 37 lessons, each with introductions to grammatical concepts, vocabulary lists, and translation exercises (both Greek to English and English to Greek). The Elements book is keyed to the Syntax book to provide students with an avenue for further reference and study.
A Key to the Elements of New Testament Greek allows people using Nunn's books for self-study to check their work.
The Logos Bible Software editions for these books are based on the 1923 editions. Together, these three books are an excellent introduction to reading the New Testament in Greek.