Hello and welcome. I love to read too and have picked up quite a few great books.
Personal favorites for me are
Aikido and the Harmony of Nature-Mitsugi Saotome
Aikido for life-Gyaku Homa
Aikido Sketch Diary-Gyaku Homma
It's a lot like Dancing, and aikido Journey-Terry Dobson
Aikido, The peaceful Martial art-Stephen Stenudd
The way of Aikido-George Leonard
In search of the warrior spirit-Richard Strozzi Heckler
The Spirit of Aikido-Kisshomaru Ueshiba
Not aikido specific-budo related
Zen in the martial arts-Joe Hayams
Living the martial way-Forrest E Morgan
And looking forward to this one with great anticipation.
Nature in Horsemanship: Discovering Harmony Through Principles of Aikido-Mark Rashid