|Your argument is invalid.|
A book can't discuss. It can't answer questions, it can't clarify points, it can't answer my concerns. It's an argument by proxy, except the proxy may as well be a statue. An echo of an author, an outline of his thought, chiseled in stone, impenetrable and unfixable.
Webpages are worse. When people link these during a discussion, it seems like they just did a quick Google search for "arguments proving this thing I believe" and then linked the first thing that came up without reading it. Zero references, false facts, terrible grammar, and bad arguments.
My new rule is this: we read together.
I'll read your book, or your webpage, only if you will read it with me. We'll chat about each chapter, or each point, and you will respond, or I will go no further. I would love to talk to you. I'm not spending any more time arguing with statues.
Recently, I found a copy of New Proofs for the Existence of God, lying face up conspiciously on my desk. Nobody's volunteered that they did it, or told me why. I have my suspicions. When they fess up, we'll find out whether they wanted a conversation or just wanted to waste more of my time.