Invincible
It's 80 pages, and many pages use colour too.
Books that are quick to access and easy to read are:
1. Adventures in EFT by Sylvia Hartman (Very well written)
2. The art &
Science of Emotional Freedom by Ananga Sivyer (very good information about how each point/meridian works)
If you have the money, I think those 2 books are a very good investment.