A. W. Tozer 
The Waning Authority of Christ in the Churches [EPUB ebook] 
His Very Last Message to the Church (Printed 2 days after his death)

This book has been described by James L. Snyder as Tozer’s valedictory. It was his last message ever given to God’s people. Written shortly before his death in 1963, it was published two days after his death. It is a challenging message to all who want to walk with Christ.