I haven't read these books but I used to have a lot of strange recurring dreams and 'memories' when I was a child, about some other life where I was a pilot of some kind.
I would even fill exercise books with many drawings of the planes and their interiors, controls, and engines. I could even remember flying them as if I had done it before, but in the memories I was not a child, but an adult probably in my 20's.
I was so young that I had barely any knowledge of planes other than seeing them in the sky, so it always seemed odd to my family. The memories felt completely real and the dreams were always very realistic and distinctly different to other dreams. The unconscious mind is quite mysterious indeed.