OP mentioned some Kevin Trudeau books. Despite never having read them, I think I can assert that these are the 'other side' books that you shouldn't even bother with. There will be absolutely zero content in these books, very few lessons on how to directly combat nonsense, and plenty of stuff that just plain pisses you off.
My suggestion is to try to find sources with at least a shred of scientific clout, or alternatively, find books written by people who are way too obscure to ever make money off their nonsense. Trudeau wouldn't meet this standard, nor would anyone cranking out a diet book once a year. If you're interested in evolution, I'd eventually check out Behe's intelligent design book to see what passes for evidence in the creationist circles. There are probably a handful climate change skeptics that are worth reading, although I honestly have no clue who they are because the conspiracy nuts have successfully elbowed them out of the way.
As Tatyana pointed out, it is exhausting trying to read some of this stuff. Some of the better hucksters are successful simply because they have time on their side; it will take you hours to fully dissect arguments that literally took them five minutes to research and write down. Not worth it.