The primary documents conflict with part of the information provided by Josephus but coincide with the part where Josephus actually quotes (and endorses) his historical source (Berossus) and conflict with biblical history as expounded exclusively by the WTBTS Inc. -- but coincide with biblical history as understood by the overwhelming majority of Bible scholars.
for Narkissos!
Incidentally, I know Scholar's not interested in reading any of the scholarship on the reigns of the neo-Babylonian kings, but for those who are, Dr. Ronald Sack has surveyed the secondary sources (the classical, medieval, and Hebrew authors) in his writings. His book on Amel-Marduk is hard to get --- I had to order it through interlibrary loan -- but his more recent Images of Nebuchadnezzar covers the same material and is more readily available. I purchased it when it came out about a year ago, and IIRC I got it through amazon rather than from one of the specialty dealers.
Marjorie