Lewis Sperry Chafer 
Satan and the Satanic System [EPUB ebook] 

If any word of mine shall add to the number of the readers of this book I shall be glad to have written it; and I sincerely wish that all believers, and especially all ministers and Christian workers, might in some way be led to read it.
The subject is vital to any right understanding of the age in which we live, and of the personal conflict which we wage; for the existence, personality, and power of Satan are awful facts and of immense present significance.
We walk in the midst of his snares, hear on every hand his doctrines proclaimed by men of blameless lives “transformed as the ministers of righteousness, ” and are allured by the pleasure, place and power of his perfectly organized world-system.
I know of no other book on Satan in which the dispensational aspects of the subject are so clearly stated, nor any other so severely Biblical.
C. I. Scofield.