Given that Baba was described as completely detached, why did he engage in the collection of holy books?

Chapter 27 addresses this apparent paradox by explaining the profound, practical purpose behind Sai Baba's collection of books. Although Baba himself was one whose desires were fulfilled and whose conduct was the embodiment of scripture, he gathered these books for the benefit of his devotees. The text reveals his foresight: he knew Shirdi would become a holy place where his 'students from various countries' would gather for sessions of knowledge. He believed that these collected books would then be useful, serving as 'images' or reminders of his presence long after he had gone to his 'own abode.' This collection was a holy and practical means of ensuring his teachings would be available for future generations.