Hey I just got a copy of this from my sister in-law (who is an OCD packrat of all things from her chdhood). Actually she gave it to my 5 year old son. Anyway, the blank areas on the front and back covers have the "May Co" logo on them. I never heard of this before, but the art is great and it's nice to see that if I wanna read the whole story to my son, you've got 'em posted!
The May Co..... Mary Livingstone probably gave them out. (ok ok, before your time)