The Bible Speaks Today: The Message of Daniel, Ronald S. Wallace (Inter-varsity Press, 1979)
Daniel, Leon J. Wood (Zondervan, 1975)
Tyndale Old Testament Commentary: Daniel, Joyce G. Baldwin (Inter-varsity Press, 1978)
What The Bible Is All About, 3rd Add., pp. 255-272; Henrietta Mears (Regal Books, 1993)
"Daniel", G. Douglas Young; The Biblical Expositor, Ed. Carl Henry (Holman, 1973)
"Daniel", The New Bible Commentary Revised. D Guthrie (Eerdmans)
Background and other reference material:
The New Bible Dictionary, Ed. JD Douglas (Tyndale, 1982)
The Harper Atlas of the Bible, Ed. James Pritchard (Harper & Row, 1987)
The Zondervan Pictorial Bible Atlas, Ed. E. M. Blaiklock (Zondervan, 1972)
Darius the Mede, John Whitcomb, Jr (Eerdmans, 1959)
The Ancient Near East in Texts and Pictures, Vol I & II, James Pritchard (Princeton, 1971, 1975)
Light From The Ancient Past, Vol. I & II, Jack Finegan (Princeton, 1969)
The Zondervan Pictorial Encyclopedia of the Bible, Ed. Merrill Tenney (Zondervan, 1970's)