Get these books: excellent descriptions of our psychological state and spiritual battle by explaining how the demons attack our nous and how we should stand guard at the door of our hearts. HUMILITY is the key. These cover EVERYTHING that I see battling in me.
St. Theophan's the Recluse: The Path to Salvation - I feel that it has everything I need to know about my invisible battle. I had the actual book and feel that it has everything except how to bring up children.
http://www.holytrinitymission.org/books ... heofan.htm
St. Nicodemos edited Unseen Warefare. This is a must have. Be careful with his strict instructions on everyday life because he is talking about monasticism which we may not be able to follow to the letter, but the key to overcoming our spiritual struggles is, again, humility.
http://ortodox.felmer.org/documents/Uns ... arfare.pdf
Amazing books that you will read more than once. But, most important, read everything by the saints because they all address our spiritual battle.