Although I am disappointed in the neglect by the devs recently the DC-6 manual from PMDG is the best I have seen.
Its a cross between a POH and a traditional old-school manual. All the dry info you need with humanised descriptions of what is actually going on under the hood, with some added wit.
That and it looks gorgeous. The only manual I have ever printed. Seeing as the company was started to create only manuals it is no surpise they are so good.
