You are right. the Ribsy, Henry Huggins, and Ramona books are Level O (which is a mid third grade level) but also around an 800L (which is near a fifth grade level.) Yikes, what a difference. I have only been looking at Fountas and Pinnel since we figured out that that was the system used by all the schools we are looking at.

I freakin' loved those books when I was young.