Recommended Reading
The following titles are recommended for students of the martial arts.
Most can be found at a good used bookstore, and links to them at Amazon.com
Ruth Benedict, The Chrysanthemum and the Sword: Patterns of Japanese Culture
Donn Draeger, Classical Bujutsu (Martial Arts and Ways of Japan, V. 1.)
Donn Draeger, Classical Budo (Martial Arts & Ways of Japan Series: Vol.)
Donn Draeger, Modern Bujutsu & Budo Volume III: Martial Arts And Ways Of Japan (Martial Arts and Ways of Japan, Vol 3)
Donn Draeger, Comprehensive Asian Fighting Arts (Bushido--The Way of the Warrior)
Leon Kapp, The Craft of the Japanese Sword
Ivan Morris, The Nobility of Failure: Tragic Heroes in the History of Japan
Ivan Morris, The World of the Shining Prince: Court Life in Ancient Japan (Kodansha Globe)
Miyamoto Musashi Miyamoto Musashi , The Book of Five Rings 
Oscar Ratti and Adele Westbrook, Secrets Of The Samurai - The Martial Arts Of Feudal Japan - A Survey Of The Martial Arts Of Feudal Japan
Oscar Ratti, Secrets of the Samurai: The Martial Arts of Feudal Japan
Edwin O. Reischauer,Japan: The Story of a Nation, 4th ed.
A. L. Sadler, The Ten Foot Square Hut and Tales of the Heike (Tuttle Classics)
George Sansom, A History of Japan to 1334
George Sansom, A History of Japan, 1334-1615
George Sansom, A History of Japan, 1615-1867
Kanzan Sato, The Japanese Sword (Japanese Arts Library)
Morton S. Schmorleitz, Castles of Japan
Edward Seidensticker, The Gossamer Years: The Diary of a Noblewoman of Heian Japan (Tuttle Classics)
Sei Shonagon, The Pillow Book of Sei Shonagon
Setsuo Takaiwa, The Art of Japanese Sword Polishing
Sun Tzu, The Art of War
Stephen Turnbull, The Samurai: A Military History
Peter Urban, The Karate Dojo: Traditions and Tales of a Martial Art
H. Paul Varley, Warriors of Japan: As Portrayed in the War Tales
Yoshindo Yoshihara, The Art of the Japanese Sword: The Craft and Its Appreciation
John M. Yumoto, Samurai Sword: A Handbook