Let me know if you want help!
Sometimes, it can be tricky to find... ( Been out of print last i checked)
I'm an old Library Geek. I'm good at Finding things.
( Had a crush on Mr. Giles, too! LOL!)
I used to know an old bookstore owner who could find odd books for me.
I'll see if they are still there, been awhile since I went looking for books, and see what they come up with.
I'll also be hunting through book stores.
Some of Heinlen's stuff may be in reprinting since the movie Starship Troopers slaughtered the book.