There’s an error I see all the time — in traditionally published books as well as indies. The mix-up? “Blonde” vs. “blond.” “Blond” can be a noun or an adjective. When it’s an adjective, you always spell it without the “e,” whether you’re talking about a man or a woman:

I saw a little blond boy going down the slide.

Look at that leggy blond chick over there!

But when “blond” is a noun, its spelling changes depending on the person’s gender. If you’re referring to a woman, you’d say,

Look at that gorgeous blonde in the red bikini!

If you’re referring to a man, there’s no “e”:

Dan Quayle was the original dumb blond.