Day Keene - Too Hot to Hold

Published by Gold Medal (931) in October 1959. Cover art by Robert McGinnis (thanks to vintageillu for the heads up)

Back cover synopsis: "They'd done terrible things to her. By now there were large black welts and bruises on her soft body. But they'd been careful to avoid damaging her throat and mouth. So she could talk.
But Linda had nothing to tell them. And that was something the two young hoods would never believe. So the torture would go on and Linda might die there on the floor - because she had no earthly idea of where the missing money was. The broken, hideous thing that lay dead in the corner of the room hadn't been able to tell them either..."