Legal notice

Last updated: 17 September 2026

Publisher

SISTEMIC, single-member limited liability company with a capital of €1,000, registered with the Saint-Denis de La Réunion Trade and Companies Register under number 109 862 698.

Registered office: Cour de l'Usine, La Mare, 97438 Sainte-Marie, La Réunion, France.
EU VAT number: FR51109862698.

Publishing director: Stéphane Teyssedre, manager.
Contact: [email protected].

Hosting

Hetzner Online GmbH, Industriestr. 25, 91710 Gunzenhausen, Germany. Phone: +49 9831 505-0. Website: hetzner.com. The servers are located in Germany.

Delivery and protection of the site are provided by Cloudflare, Inc., 101 Townsend St, San Francisco, CA 94107, United States.

Sale of the book

The book is sold by Amazon (Kindle edition) and by Gumroad (direct purchase of the EPUB file), which collect payment, issue the receipt and apply their own terms of sale. SISTEMIC collects no payment on this site. Prices shown are indicative and may vary by store and country.

Personal data and cookies

This site sets no cookies and has no forms.

Like any web server, it keeps technical logs (IP address, date and time, requested page, browser). They are used only for security and to keep the site running, on the basis of the publisher's legitimate interest, and are deleted after 30 days.

Traffic is measured with PostHog, hosted in the European Union (Frankfurt), in cookieless mode: no identifier is stored on your device. The country of the visit is provided by Cloudflare, without passing on your IP address. PostHog uses the IP address only to compute an anonymous identifier, then deletes it without storing it. We measure the pages viewed, the site you came from, the country, the device type and clicks on the store buttons. This data is used only to understand how the site is found and used.

An email sent to [email protected] is used only to reply.

The buy buttons lead to Amazon and Gumroad. On those sites, your data is processed under their own privacy policies.

You can request access to, correction or deletion of your data, or object to its processing, by writing to [email protected]. You can also lodge a complaint with the French data protection authority, the CNIL.

Website development

Website developed by Coding974.

Intellectual property

Texts, cover and logo belong to SISTEMIC and the author. Any reproduction without written consent is prohibited.

Typefaces: Anton, Big Shoulders Display and Newsreader, under the SIL Open Font License 1.1.