There is a PDF copy on archive.org that I would link to but am not sure of the copyright situation (a book from 1959 would seem to still be in copyright, but OTOH archive.org doesn't usually have pirated stuff). If you do a text search on that site, you want the version with the cover that is pleasant to look at but not really appropriate given the content of the book.
There is also a long-running thread on /t/ that has ebooks (and/or pdf scans) of most fantasy/sci-fi sorted by decade and author. I think they're up to the 2000s now, so all of Heinlein should be in there somewhere
There is a PDF copy on archive.org that I would link to but am not sure of the copyright situation (a book from 1959 would seem to still be in copyright, but OTOH archive.org doesn't usually have pirated stuff). If you do a text search on that site, you want the version with the cover that is pleasant to look at but not really appropriate given the content of the book.
https://archive.org/details/starshiptroopers0000hein
https://help.archive.org/hc/en-us/articles/360016554912-Borrowing-From-The-Lending-Library-A-Basic-Guide
There's also another copy on there that doesn't have those "borrow" restrictions.
Link URL?
I'm not sure about the copyright situation of that copy. If you do a text search for the book title you will find it.
There is also a long-running thread on /t/ that has ebooks (and/or pdf scans) of most fantasy/sci-fi sorted by decade and author. I think they're up to the 2000s now, so all of Heinlein should be in there somewhere
... so, about a link to this thread? 🏴☠️
Ain't nuthin' to see here occifer
Are, thankee kindly, fellow cap'n upon the Spanish Main. Yar, har, fiddle-de-hee...