Fiction is written from inside the head of the characters. Fiction books are books about making choices, about taking actions and seeing how they play out, and the characters don't already know the answers when they're making their decisions. Fiction books often seem to most closely resemble the problems that I face in my life.

Books that have people succeed for the wrong reasons I can put down, but watching people make good choices over and over and over again seems like a really useful thing. Books are a really cheap way to get some of the intuitive advantages of additional life experience. You have to be a little careful to pick authors that don't teach you the wrong lessons, but in general I haven't found a lot of histories or biographies that really try to tackle the problem of what it's like to make choices from the inside in an adequate way. If you've read lots of historically accurate works that do manage to give easily digested advice on how to make good decisions, I'd love to see your reading list.