All of Grace by Charles H. Spurgeon.

An Earnest Word with those who are Seeking Salvation by the Lord Jesus Christ. 

"Every word is weighted with precious truth, and truth so simply and convincingly put that none can fail to understand God's way of salvation. Powerful illustrations, apt and original similes, and the one affectionate desire to win for Christ and to Christ, make it a gospel treasury of priceless worth."—The Christian (1906).