Ender's Game?
Boy, that made me feel my age. I was actually subscribing to Analog in 1977 -- and if I read Ender's Game when it appeared then, I don't remember it now. I do have a faint memory of skipping the O.S. Card stories, though. I think I may have considered him a blowhard. Haven't read any of his stuff since, either.
The Wikipedia article makes Ender's Game sound like a ripoff of Heinlein's Starship Trooper, complete with Bugs and raging Political Incorrectness.