Mitsunari Kanai @ Cambridge Aikikai Mitsunari Kanai - Technical Aikido
David Halprin Claude Berthiaume
Mary Heiny William Gleason
Yoshi Shibata Aaron Cass
The Art of Peace - Morihei Ueshiba (translated by John Stevens)
A collection of sayings, quotes and poems by Morihei Ueshiba. This is the compact version that will fit in your pocket. At 125 pages, it's a great way to get a sense for how O'Sensei envisioned Aikido in his own words.
Invincible Warrior - John Stevens
A pictorial biography of O'Sensei's life. Beginning with his upbringing in the Japanese countryside, this book traces his martial development from his early training in Daito-Ryu Jujitsu through his eventual creation of Aikido. There are also some wonderful candid shots of O'Sensei sprinkled throughout the book.
Budo: Teachings of the Founder of Aikido - Morihei Ueshiba
In his lifetime, Morihei Ueshiba only authored one book, which he only gave to select individuals. With the approval of Kisshomaru Ueshiba, his son, Kodansha was able to publish it here. Filled with some stunning pictures of the founder, this book is a historical treasure and recommended reading for anyone who practices Aikido.
Remembering O'Sensei - Edited by Susan Perry
A collection of stories, memories and reflections on Morihei Ueshiba by his students. Much of what O'Sensei himself said can be hard to understand because it's wrapped in Shinto mythology - hearing what his students have to say reveals a mischievous, warm-hearted side of the Founder we otherwise wouldn't see.