Cookie Policy
Every cookie this site can set, what it does, and how to change your mind, on one page.
1. One choice, honestly kept
If you visit from the EU, the EEA or the UK, this site asks one question on your first visit. Necessary is always on: on this site that is the cookie that remembers your choice and, once you log in to your account, the cookies that keep you logged in. Advertising stays off unless you switch it on. Analytics is not in use at the moment. Your choice does not affect your access or your price, and declining is exactly as easy as accepting.
Everywhere else the question does not interrupt you: Advertising is on when you arrive. You can switch it off at any time with Your Privacy Choices further down this page; switching Advertising off is applied with Meta’s Limited Data Use flag where required.
2. Every cookie this site can set
btw_consent
Remembers the choice you made in the cookie question, so we do not ask again.
12 months, or 6 months if you declined
btw_portal
Keeps you logged in to your account and the online book after you log in with your email address. Set only when you log in.
90 days, or 7 days after a one-tap link
btw_portal_csrf
Protects the login form against misuse from other sites.
12 hours
btw_portal_ty
Lets the thank-you page open your new order once, right after you pay.
1 hour
zwl_tyk
Lets the thank-you page open the ebook you just bought, on the browser you paid with and nowhere else.
1 hour
_fbp, _fbc (Advertising)
Meta’s pixel: measures whether a Facebook or Instagram advertisement brought you here, whether you went on to the checkout, and whether you bought. Loads only while Advertising is on.
About 3 months
With Advertising on, a few short notes are also kept in your browser’s own storage rather than in cookies: ours make sure a purchase is counted once, and Meta’s remembers which page sent you here. The online book keeps your reading settings and your place there too, so it opens where you stopped. That is the complete list today. The cookie question is also wired for Google Analytics, TikTok, Pinterest and X, but none of those are in use; if one is ever switched on, it loads behind the same choice and this page will say so. Checkout itself happens on the secure pages of our payment processor; any cookies set there are theirs, on their own domain, covered by their own policy.
3. The server-side part
While Advertising is on, our server also tells Meta directly when you go to the checkout and when you buy, so the measurement survives browser restrictions. A purchase carries the order value and the pixel identifiers above; a click through to the checkout carries the price of the edition and the same identifiers. The details are in the Privacy Policy. In the EU, the EEA and the UK this never happens without your Advertising consent.
4. Global Privacy Control
If your browser sends a Global Privacy Control signal, we honour it as a choice in its own right: for US visitors it is treated as an opt-out of ad measurement, applied with Meta’s Limited Data Use flag where required.
5. Change your mind
The cookie question reopens whenever you want. Your new choice overwrites the old one on the spot.
6. Questions
Anything unclear about cookies or measurement: stevan@the16laws.com.
Last updated: 14 November 2026