But I wish I had!
The first appears to be a French sci-fi novel from the 1970s entitled "Galactic Guerillas," which is totally a book I could get behind. I want a copy, pretty much NOW. let me know if you've got one kicking around in the basement... n'est-ce pas?
Thanks to my Goodreads page for tipping me off about it (and for giving me credit for writing it, which I didn't, as I was about 13 years old at the time... but hey, I'll take the credit for it.)
POSTSCRIPT: While looking for cover images of Guerillero Galactique, what should I come across but a 1982 book by the same author called Invasion Cosmique. Gosh, I wish I spoke French better so I could understand what this title meant...