The Secret Martians by Jack Sharkey

Ecerpt:

I was sitting at my desk, trying to decide how to tell the women of America that they were certain to be lovely in a Plasti-Flex brassiere without absolutely guaranteeing them anything, when the two security men came to get me. I didn't quite believe it at first, when I looked up and saw them, six-feet-plus of steel nerves and gimlet eyes, staring down at me, amidst my litter of sketches, crumpled copy sheets and deadline memos.
It was only a fraction of an instant between the time I saw them and the time they spoke to me, but in that miniscule interval I managed to retrace quite a bit of my lifetime up till that moment, seeking vainly for some reason why they'd be standing there, so terribly and inflexibly efficient looking. Mostly, I ran back over all the ads I'd created and/or okayed for Solar Sales, Inc. during my five years with the firm, trying to see just where I'd gone and shaken the security of the government. I couldn't find anything really incriminating, unless maybe it was that hair dye that unexpectedly turned bright green after six weeks in the hair, but that was the lab's fault, not mine. So I managed a weak smile toward the duo, and tried not to sweat too profusely.