While they are uneven, I think that the Tyndale series is very good, and since they are small paperbacks, cheaper than something like the Word Biblical Series (which you would be insane to buy as a set).

__________________
Fred Greco
Senior Pastor, Christ Church PCA (Katy, TX)
Christ Church Blog

"The heart is the main thing in true religion...It is the hinge and turning-point in the condition of man's soul. If the heart is alive to God and quickened by the Spirit, the man is a living Christian. If the heart is dead and has not the Spirit, the man is dead before God." (J.C. Ryle)