[whack]

Different people write books for very different reasons, with very different styles.

Some want to maximize their profits. Some want to be formal, and 100% focused on the core-topic. Some want to please every single potential reader. And some see it as an avenue for self-expression and having some "fun" on the side.

The author probably knows that his writing style is going to turn off a number of potential readers, which in turn is going to reduce the amount of money he can make. Clearly he has decided that he's ok with this. He has even gone out of his way to warn readers, so I don't think anyone is justified in complaining. He's entitled to write books in any style he finds fulfilling, just as everyone's entitled to boycott his books if they don't like it.

[ianai]

“And some see it as an avenue for self-expression and having some "fun" on the side.” this usually leads to more interesting reads. Not for everybody, but even Shakespeare had contemporary critics.