Bill Gates has a rule: finish what he starts when it comes to reading books. Concentration is vital, especially for non-fiction. Taking notes helps him think deeply, though disagreeing with a book frustrates him and leads to extensive margin writing.
He's considering Infinite Jest, a fiction book he became interested in after enjoying The End of the Tour, which featured the writer David Foster Wallace. However, its length and complexity give him pause, as he usually prefers shorter books.
Bill values dedicated reading time and carries a voluminous, antiquated book bag when travelling. He spends over an hour each night on his current book, recognizing the need for uninterrupted reading sessions.