Or watch First Man which opens with Neil Armstrong having an interesting flight in the X-15.

There's also an old movie called "X-15" which I enjoyed a lot as a kid.

As a young kid here in the UK I had a Ladybird book with a picture of an X-15 - almost 50 years later I can still remember my fascination with that machine.

99% Certain it was this one:

https://www.arranalexander.co.uk/exploring-space-vintage-lad...

Now I have to find one!

It’s one of the greatest spaceflight books I’ve read. It’s movie still holds up very well even today.