I recommend 50 books and 26 movies about Ninja, Samurai, Bujutsu, martial arts, philosophy and Asia. Not all books are always available, some can only be found in antiquarian bookshops. Likewise, some of the films are hard to find.
Books
Gyokko Ryû Taijutsu no Kata: Bujinkan Budô Denshô
Kukishinden Ryû Taijutsu no Kata: Bujinkan Budô Densho
Togakure Ryû Taijutsu no Kata: Bujinkan Budô Densho
Kotô Ryû Taijutsu no Kata: Bujinkan Budô Densho
Shinden-Fudo Ryû Jûtaijutsu no kata: Bujinkan Budô densho
Takagi-Yôshin-Ryû Taijutsu no Kata: Bujinkan Budô Denshô
Ten Ryaku no Maki: The Principles of Heaven
Chi Ryaku no Maki: The Principles of Earth
Jin Ryaku no Maki: The Principles of Human Being
The Way of the Ninja: Secret Techniques
Art of Japanese Sword Fighting: Secrets of the Samurai
Advanced Stick Fighting
Unarmed Fighting Techniques of the Samurai
Secrets from the Ninja Grandmaster
Essence of Ninjutsu: The Nine Traditions
The Grandmaster's Book of Ninja Training
Ninjutsu. History and Tradition
Understand? Good Play!
Stick Fighting: Techniques of Self-Defense
Ninja: The Invisible Assassins
Ninja 1: Spirit of the Shadow Warrior
Ninja 2: Warrior Ways of Enlightenment
Ninja 3: Warrior Path of Togakure
Ninja 4: Legacy of the Night Warrior
Ninja 5: Lore of the Shinobi Warrior
Ninja 6: Secret Scrolls of the Warrior Sage
The Book of Ninja: The Bansenshukai
True Path of the Ninja
The Ninpiden - True Ninja Traditions
The Secret Traditions of the Shinobi
Kokoro no Katachi: The Image of the Heart
The Art of Life and Death: Lessons in Budo from a Ninja Master