Yes, both books by PhDr. Oliver Scharfenberg, CEO of Syntharis Group, can be downloaded free of charge on the Syntharis Group website. The AI Visibility SEO & GEO Playbook (English) explains how to be found, trusted and cited by Google, ChatGPT, Perplexity and other AI search engines, with frameworks such as the Visibility Stack, the 5C Test and a 90-day GEO roadmap. The Praxisleitfaden Mitarbeitergewinnung (German, 2026) shows small and medium-sized companies how to win more suitable applicants, from the candidate journey to employer seals and onboarding.

The methods in the books are the same ones Syntharis Group uses in client projects. Many readers use them to assess their own situation before deciding whether they need outside support.