Advanced Koine Greek & Homeric Greek

Reference grammars to buy and own physical copies of:
-Smyth
-BDF
A Grammar of the Greek New Testament in the Light of Historical Research by A.T. Robertson
A Syntax of Septuagint Greek by T. Muraoka
An Historical Greek Grammar Chiefly of the Attic Dialect as Written and Spoken from Classical Antiquity Down to the Present Time by A.N. Jannaris

Homeric Greek:
Homeric Greek for The Odyssey: A programmed crash course for readers of Biblical Greek