https://openbook.beehiiv.com/ 2026-01-10 https://openbook.beehiiv.com/authors 2026-08-30 https://openbook.beehiiv.com/authors/lefa-gabonthone 2025-04-01 https://openbook.beehiiv.com/p/an-exit-strategy 2025-08-15 https://openbook.beehiiv.com/p/the-idea-of-urgency 2025-04-14 https://openbook.beehiiv.com/p/book-five-rings 2025-04-15 https://openbook.beehiiv.com/p/first-principles-thinking 2025-04-15 https://openbook.beehiiv.com/p/21st-century-skill 2025-04-14 https://openbook.beehiiv.com/p/philosophy-selfreliance 2025-04-15 https://openbook.beehiiv.com/p/developing-lattice-mental-models 2025-04-14 https://openbook.beehiiv.com/p/welcome-open-book 2025-04-14