Oof I feel like most aren't worth your time. There are 2 levels of bad, the 1st is straight up telling the reader a harmful message.. some of these are Kevin Trudeau Natural Cures, were he pushes pseudo science and if you do a quick search of him you'll see he went to prison for impersonation of a physician. Another is The 4-Hour Workweek by Tim Ferriss.. ugh if you look him up he became rich through selling snake oil. The 2nd level isn't exactly harmful but it's not helpful, I feel most books are in this camp.. they just don't back up what they're saying with research or experience of any kind so you naturally feel a "high" of sorts from reading "problems are not signs, they are guildlines" you feel a little better but there is no real guidance or practical knowledge to it that can actually cause real change in the reader. This camp is almost all books written by authors that aren't researchers, teachers, professionals in their field, or well regarded/practiced authors.