Really, no book can replace a good teacher but here are a few that can put you back on the piano track. Welcome back.
1) Fundamentals of Piano Practice by Chuan C. Chang. This is a free book which you can download from the URL below. Helped me a lot and the author recommends the two books below among others.
https://www.sinerj.org/~loyer/PianoBook/2) Sandor, Gyorgy, "On Piano Playing". Very good. I am still in the process of reading it and trying out stuff it recommends.
3) Fink, Seymour, "Mastering Piano Technique". I have not read this but it is supposed to be more comprehensive than Sandor's.
Of course, you can also post questions on this forum and Bernhard will write a book to answer your questions.

Regards,
dennis lee