De Kosmische Bongenoot

Scout-Officer John Leeming knew from the very start that his reconnaissance mission deep into enemy territory would likely be a one-way trip. But, after he crash-lands on a far distant planet and becomes a prisoner of ruthless aliens, he knows he can't just give up. Armed with only a piece of wood, a coil of copperlike wire, his quick wits, and an imaginary ally called Eustace, Leeming embarks on a brilliant campaign to gain his freedom--and undermine the alien war effort, too. This original, full-length version of one of Russell's most popular stories, "Plus X," is amusing, adventurous, fast moving, and razor sharp. Poking fun at bone-headed and inflexible bureaucrats and institutions, it ranks among his very best work.

Also known as "The Space Willies" when published as part of an Ace Double:

https://www.goodreads.com/book/show/1...