John Owen, The Glory of Christ. This book gave great devotional thoughts to meditate on, "We might look on him praying, weeping, crying out, bleeding, dying,--in all things making his soul an offering for sin; so was he "taken from prison, and from judgment; and who shall declare his generation? For he was cut off from the land of the living; for the transgression," saith God, "of my people was he smitten," Isa. 53:8. But these things I shall not insist on in particular, but leave them under such a veil as may give us a prospect into them, so far to fill our souls with holy admiration (Works of Owen Vol. 1 pg. 341, this was from his book Meditations on the Glory of Christ)."
Christ All in All by Philip Henry, published posthumously by his children. This book gives 40 offices of Christ. Though it does not hone in on just the atonement, it does cover Christ our Passover, Propitiation, Resurrection, Redemption, Altar, and then the last two chapters deals with Christ our all.
One of my favorite quotes from this book comes from the Christ our Life, "If there are no inward breathings towards God, no desires after him, no hearty praying, otherwise than in a cold, dead form rested in, the soul is dead. Crying is a sign of life. If there are no spiritual senses exercised, seeing, hearing, tasting, feeling; no sense of burden in sin, no taste of sweetness in the Word of God, no sight of invisible things, no ear to hear the voice either of the word or rod; the soul is dead (pg. 97)." From the chapter entitled, Christ our Redemption, "To this purpose we are told of a covenant of redemption which was transacted from all eternity between the Father and the Son, the terms whereof were--That if the Son would come and be a man and die, or that dying of his should be accepted as the price or ransom of all the elect, how many soever there were. The Son accepted of this motion, did what was to be done, suffered what was to be suffered, and so became our redemption (pg. 290)." Christ our altar, "Now our altar is Christ: the same is also our sacrifice. Of him we have all a right to eat, and may each of us take our part in him, and be refreshed and nourished by him if we will. But multitudes will not eat, that is, will not believe in him; for eating is believing, John 6:53-54 (pg. 361).