I just read the Wikipedia summary of the novel and really? I thought Weir stuck to actual science, not making things up for which there is no known physics allowing it. (I'm speaking of the 'astrophage' ability to suck energy out of a star by somehow concentrating it into something like a laser beam but without using any collimater at the source.)
I'd be throwing the book against a wall the moment I came upon that detail. Any hand wave allowing it (force fields?) would be equally bad.