The Custodian of the Two Holy Mosques King Salman bin Abdulaziz – may d protect him – owns a private library in his prosperous palace that is considered the largest among the private home libraries owned by a ruler or world leader in this era. This library was born great and full of various types of science and knowledge, as a result of the close relationship and ancient ties of the Custodian of the Two Holy Mosques to reading in general, and the book in particular, as an eternal symbol of knowledge and information. Since his upbringing in the school of his father King Abdulaziz – may d have mercy on him – he has formed a spirit of permanent information. Hardly a book is published inside or outside the Kingdom but he has information about it, and no article or topic is published in the press but he is aware of it.