So, I just happened to find this on Amaz---.jp, & fortunately, the table of contents is very detailed. I found exactly what I wanted, & am currently 'reading' ch #3.
Apparently, it was a big secret that a woman was the voice of Atom. I recall a SIMPSONS episode in which Bart & Milhouse[?] are talking about just that.
The same female voice actor that did the voice of Astro in the English dub of the 1963 series also supplied the voice of Kimba the white lion in that English dub.
Billie Lou Watts was her name. She also did the voice of Astro Girl in the 1960s English dub. Mari Shimizu also did the voice of Atom in the 1980s series. The autobiography sounds interesting. Looking forward to hearing more about the book.--Astrobuddy