A book that I desire to delve into more deeply is Conybeare and Stock’s Grammar of Septuagint Greek. The grammar itself is short, and still leaves to be desired a fuller grammar of Septuagint Greek. But the selected readings have Septuagint text with reading helps at the bottom of each page, and make for a nice bridge into reading Old Testament Greek. The readings section looks like this (click to enlarge):
The grammar is pretty dense, and feels sparse in places, but I haven’t had a chance to examine the book thoroughly yet. The selected readings have helped me in improving my Greek, though. It’s recommended reading on this Septuagint Sunday.