This is a contact page – it’s actually not necessary for most author websites, but it’s common. If my menu got too busy, I would hide it under the “about me” menu as a subcategory, and I could link to it from my About page. “Contact Form 7” is a great WordPress plugin to make forms like this, that will forward messages to your email.
You want to make yourself available. You don’t want to make it impossible for people to find your email address or contact you. But it also isn’t the most important thing on your site (few people will actually contact you – and you don’t really want them to! You want them to buy your book or sign up to your list, so those are priorities).