Albert Benjamin Simpson was a Canadian preacher and theologian who founded the Christian and Missionary Alliance which placed an emphasis on global evangelism. Simpson was raised a Calvinist and converted in 1859. Simpson would later leave Canada and go to the United States for Presbyterian churches in Louisville, Kentucky and New York City.
After just two years in New York City, Simpson resigned from the Church to begin a gospel ministry targeted for new immigrants and the poor and uneducated people of New York City. Simpson was considered a very effective communicator and his writing is very Christ-centered.
A.B. Simpson's book Walking in the Spirit discusses Christ's way of righteous living. This edition of Walking in the Spirit includes a table of contents.