Support the book
The book is free. That is the honest move for an argument about the current price of knowledge, and removing every barrier is the best distribution a book like this has: no paywall, no email gate, nothing to unlock.
But free was never the same as worthless; that, more or less, is the argument of the book. If it was worth something to you, you can name what it was worth. One time, any amount, no account required.
The price of the coffee you would have read it over, if you like. More, if it earned more. Or nothing at all. If you already read it, that was the main point.
Not wired yet. To go live, create a Stripe Payment Link (new product "Support — SLOP," set price to customer chooses what to pay, allow any amount), then run the server with SUPPORT_URL=<that link>. Any Ko-fi or Buy Me a Coffee URL works too. ~2 minutes; this button wires itself the moment the URL is set.