the award for book I’ve owned the longest, and most repeatedly attempted to read but never finished without a doubt goes to “Gödel, Escher, Bach”. i think I’ve had in for 30 years. attempts to finish, maybe a dozen.
i could possibly convince myself to read it while watching the MIT opencourseware lectures videos that accompany the course “Gödel, Escher, Bach: A Mental Space Odyssey”.