6 books that leaders say changed them in 2025

From a handbook on delegation to a treatise on infinity and a lesson in how to validate the people around you - here are the year’s top reads chosen by cognitive scientist Steven Pinker, organizational psychologist Adam Grant, and tech leaders Ayumi Moore Aoki, Angela Oduor Lungati, Mohit Joshi and Jumana Al Hashal. Which book had the biggest impact on you this year?