Just read everything, that's what I do, and your knowledge is better that way. I think some books are going to be liked by others some not, some are more unreliable, sure, but as long as you know that what is the risk of reading it. Everyone finds different things relevant, and each writer/historian has their own truth, that they might display in their work. In some sense, all history is informed by bias, and by reading all of it, you know it all, as much as can be captured from long ago days, and you are not the victim of just any historian. the Best of it to read original documents, what these people themselves wrote, which is at least from them however inaccurate it might be.