Doing an essay on this for History, the main debate of this question is whether the Marshall Plan was more politically motivated rather then economically motivated. Any sources, facts and books to help with this? Any help is appreciated thank you!
I would recommend that you realign your thinking. Politics and economy are almost inseparable.
It seems that the big question you're getting to is whether or not the US and its allies sought to rebuild Europe to prevent the USSR from taking over. That is, who would hold sway in Europe, the US or the USSR? It's quite true that the Marshall Plan was devised in part to answer this question.
Think about what the immediate post-war goals were for both the US and the USSR. What were they trying to do in Europe? What were they trying to prevent? Consider the political economy of post WWI Germany. The utter economic devastation didn't work out so well, did it?
As mentioned in another comment, Gaddis is pretty good on this. I prefer Tony Judt's Postwar: A History of Europe Since 1945. Judt's book is little excellent, fantastically written.
I'm not gonna go into the reasoning behind the Truman administration's creation of the European Recovery Program/Marshall aid program. I'd suggest you think carefully about whether economics can really be divorced from politics, however. There are also a large number of books available on the topic which you might find interesting.
One of the more accessible and easy to read books discussing the origins of the cold war, including US involvement in post-war Europe, is The Cold War by John Lewis Gaddis. It was written as an introductory work for undergraduate students, and if you are lucky your local library might have a copy.
Another introductory book which I've had recommended - although I haven't had the opportunity to read it myself - is The Marshall Plan: A New Deal for Europe by Michael Holm. It's a little bit more advanced than Gaddis' book, but does tackle primary documents and interviews more directly. It's supposed to be a good read.
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