There are many Unity books available for reading at http://uniticsonline.tripod.com/uni-texts.html.
Titles you may be familiar with:
Lessons in Truth by Emily Cady
Atom-Smashing Power of Mind by Charles Fillmore
Christian Healing by Charles Fillmore
Jesus Christ Heals by Charles Fillmore
The Revealing Word by Charles Fillmore
Myrtle Fillmore's Healing Letters by Myrtle Fillmore
Emmet Fox Speaks by Emmet Fox
Take this opportunity to read books from our founders on whose shoulders we stand.