Im reading two books at the moment
"Japanese Army Operations In the South Pacific Area" translated by Steve Bulllard, Australian Ear memorial, 2007.
Its an account of generally well known operations in the South Pacific, but told from the operational Point of View of the japanese High Command. gives some reasonable detail on formations that served, planning and execution of operations. Im only up to the capture of rabaul and the Lae-Wewak and Admiralty Islands Groups.
I would rate it as a good information source, but a bit hard to read, The rtanslation is fine, but the layout, being based on a Japanese source, is a bit hard to follow.
2nd Book
"Fighting In Hell - The German Ordeal On The Eastern Front" Edited by Peter Tsouras, Presidio Press, 1995. Its a collection of essays and reports done for the US Army in 1950-52 by some ex-members of the german General Staff. Some of the original authors. It included work by Halder himself, , Erhard Rauss, General Erfuth and Von Greiffenburg an impressive representation.. Its language is a bit dated, and its a little on the patronising side in its accounts, but it gives an excellent insight into the problems and successes that the Wehrmacht encountered on the Eastern front. Suffice it to say that the latter day myths and legends that have been nurtured by some, including some in this place, are pretty much debunked by this little book.