I think what you occupy you brain with during your day is affecting what you dream, but sometimes it have a delay. I play a lot of video games, and I can play the same game for a week, and after a week I usually get dreams about it, even as I stopped playing for the time being. So I should probably soon get dreams about the game Smite if I'm correct.

But my answer to this is it's not only what you read, but everything you occupy your brain with, if you are worried and think about not getting a certain job a lot for instance you will start dreaming about it.