The only I know of specifically about funding would be "German Big Business and the Rise of Hitler" by Henry Ashby Turner Jr.

But my point of view is that the zionists jews may have indeed allowed some funding to go through German big business but that it's more complicated than just initial funding and one shouldn't completely throw away what the Germans did in WW2 because of it.

After Hitler took power he had to make creative transactions without money to make things work, another book which glances on this is: Derrota Mundial by Salvador Borrego (It's only in Spanish though) But I think this is basic knowledge. He made deals without money with many countries such as Mexico.

But please consider this which are also facts: There are two types of jews, ones who wanted to assimilate or even control the world without making a national jewish state (those were against Hitler from the beginning hence the boycott in 1933).

And there are the zionists jews who wanted a homeland and to control the world from Palestine (what they later named as so called: israel and which in a way now does control the world).

The zionists jews won, most jews who did go to the camps, who were not that many if I may add, where from the good ethical jews who did not support the zionists jews.

I think the zionists jews also made agreements with Hitler that if he let the rich zionists jews out of Germany they would let him be which they DID! Until they they got out everything out of him then they turned on him.

Lastly, the problem with Nazi ideology is that in a way it is no different than zionisms, or perhaps they tried to emulate it. That's why many Nazi officials respected zionists jews more than non zionists although some of the non zionists jews were more humane and ethical.