Strong Systematic Theology is a detailed and extensive Systematic Theology. It might be too complicated for the average Christian. Has a lot of reference notes to other works on various points of Bible doctrine.
This work is only in theWord format at the moment.
Download: Strong Systematic Theology (for theWord).

My Tracts on Church Attendance The first and foremost reason to go to church is because God commands us to do so (Hebrews 10:23 Let us hold fast the profession of our faith without wavering; (for he is faithful that promised;) 24 And let us consider one another to provoke unto love and to good works: 25 Not forsaking the assembling of ourselves together, as the manner of some is; but exhorting one another: and so much the more, as ye see the day approaching.).
Coming in behind that direct command of God, we go to church in order to worship God Himself. How? Simple. We hear the Word of God actually read and carefully explained, and then we assimilate those principles y exhortations into our personal lives, and that is worship. Without those elements, there is no worship, and there is no success at "going to church." It is fruitless spiritually, and without spiritual benefit to your life, you will get discouraged and stop going, stop being committed to it, and it will ruin your life because you are a hypocrite.

Tracts on Church Attendance
ch22 Pastorless Flocks
ch17 Why do I Attend Church?
ch15 Congregating because we Love
ch14 Finding a good church
ch09 Our One another Relationship
ch43 Time to leave your church?
Also see my article on Getting People to Faithfully Integrate into the Church.