First: Book Data Description (Bibliographic Data) Main Title: Muslim Castles Threatened From Within and Without. Subtitle: A systematic analytical study of contemporary internal and external challenges, followed by an explanation of the pillars of confronting them in light of the Quran and Sunnah. Series: Studies in Light of the Quran and Sunnah. Authorship: Dr. Muhammad Abdul Qadir Hanadi (Professor at King Abdulaziz University - College of Arts, Jeddah). Publisher: University Student Library (Mecca Al-Mukarramah - Al-Aziziyah). Publication Year and Edition: First Edition, 1987 AD (Approximately corresponding to 1408 AH). Subject Classification: Islamic Thought / Islamic Culture / Contemporary Politics and Sociology. Second: Book Condition Report Through visual inspection of the attached image, the book's condition can be classified as "Very Good to Fine" as a used book that is approximately 40 years old: Outer Cover: The paperback cover is intact and has retained its original colors (green tones) without significant fading. The corners and edges are sharp and largely intact without wear or tear due to moisture or poor storage. Visible Defects: There is a very slight trace of an old sticker (either a price tag or a library code) at the top left, and a trace of another sticker on the right above the series logo. These are minor superficial defects that do not affect the integrity of the structure or the text. Binding: The book appears structurally sound (the spine is intact, and there is no separation of the quires). Third: Book Rarity and Market Value 1. Book Rarity: The book is classified in the used and antique book market as "Scarce" to "Relatively Rare". Reason: Books published by old local or academic publishing houses like "University Student Library in Mecca" in the 1980s were often printed in limited copies intended for students or local circulation, and were not widely reprinted commercially later. Its presence in digital libraries or auction houses is scarce, which increases its value to researchers interested in Islamic thought literature and confronting challenges in that era (the 1980s).