The House of Many Doors — Dorothy Daniels

To die by fire -- that was the Barclay destiny.

Carina's mother had died in a fire of mysterious origin, and her grandfather lived in fear of the same fate. He had built his house with many doors so that he could escape the fire he knew would flare someday. But when the blaze began, no door would open to his frantic pressure.

Now Carina was the last Barclay, heiress to a legacy of fiery death. If her would-be executioners were human, she could hope to escape. If they were not, what power could save her?