Most of my life I have been self study, and even whilst playing grade 8+ music and for the most part I had little knowledge of theory and never read any formal books on studying. What I might add though, is this is not the right way to learn by any means, I 100% advise any serious piano student to get a teacher.
HOWEVER
Honestly, from my own experience, you should simply consider either:
Getting a teacher all the way, from start until you're where you want to be (the method I 100% recommend if it's practical to do so)
OR
Don't look to any books at all that offer practical theories / help / methods UNTIL you have problems with your playing or you hit a brick wall. I do believe 9/10 times if you simply play comfortably, and actually listen to the sounds you are making, you will do fine.
Obviously for a complete beginner there may be some research you will need to do to understanding reading music, scales, dynamics and fingers but a bit of googling can tell you all that without reading an unnecessarily complex 'piano method'
Sidenote
DO learn music theory.