Never had much trouble with fiction; if I didn't get it, I just let it go (and I majored in history and literature.) But if you really want to feel like your brains are being taken out with an ice cream scoop, I could point you at a couple of Photoshop how-to books. There's no reason that technical books have to be badly written, but they usually are -- they feel like somebody wrote an outline and then a hired factory crew filled it up with words.
Also, in my experience, the "For Idiots" books are; I struggled to get through the inane time- and space-wasting jokes and cutesy prose. I tried reading them because there are a number of things about which I'd like to know just a little bit, rather than a lot, but I couldn't handle the bad vaudeville acts, and so gave them up.
As a reader of history, I find that academics, despite their poor reputation as writers, are often quite good; and the further they are from the English and philosophy departments, the better they seem to get.
JC