u/Living-Rain-995

I am a beginner, just starting my piano lesson. I have seen the Alfred's Piano Book is recommended a lot, but quite confused with the selection. Is there specific one that people recommend? Do the content overlap with each other?

Example, the one I saw:

- Alfred’s Basic Piano Library Lesson Book Level 1A

- Alfred’s Basic Piano Library Lesson Book Level 1B

- Alfred's All In One Course Book 1

Is the all in one book have the same content as level 1A and level 1B? For adult beginner which book is more suitable to get?