Hard as a Rock introduces readers to Iliona, boss lady of Mina's Paranormal Protection Agency. We also get our first (delicious) look at Cal, a gargoyle who works at PPA, when her whiny ex, Kenneth, comes to harass her. After making short work of Kenneth, Iliona discovers Cal's been keeping watch over her and he likes what he's seen. It's been awhile and Mr. Buzzy "was nearing motor burnout", so she welcomes Cal's tentative advances, which quickly progresses into a super hot, rock hard romp. This was waaaay too short a story. But, it was a wonderful appetizer for the rest of the books in the series, which I inhaled.