Peter A Goldsbury
An English translation has appeared of 合気道開祖植芝盛平伝. It is called A Life in Aikido: The Biography of the Founder Morihei Ueshiba. It is published by Kodansha at 35 US dollars.
The translation has been made by Kei Izawa and Mary Fuller.
Hello Professor! Thanks for putting something up on this one... It's not set for release until December. Amazon has it on pre-sale
now at $23.10 US. I should have a review up over on AJ in late November.