The first book, "Princess of Mars," is a lot of fun. It's entirely brainless, of course, and racist, and misogynist, and Imperial, and all sorts of other things you would expect from this kind of book
Racist? Really? You got that from the book/series? I found it to be quite opposite - more of a condemnation on racism. Red and Black men/Barsoomians are good guys and the White men/Barsoomians were evil. This written at the time when the Red and Black humans were still treated as second-class (or worse) citizens while the Whites were the top of the pecking order.