The Series originated in 1964. It was the author William Murray who realised that everyday speech involved the use of very few key words and that if these were taught first then the rest would follow. It is the Series that "taught the World to read". It is still in print today. It features the characters Peter and Jane with their dog Pat.
In this original series you wil see a key on the front cover. Those with a white key on the right precede the others. The contents are the same only the images change.