Jekyll And Hyde, by Gordon Lawrie

By day Beth was a respectable pastor; by night she wrote racy erotic fiction under the assumed name "Queen Of The Night". As the latter, she achieved considerable notoriety for her "Angelique's Adventures", tales of a city girl in small-town Ontario. On occasion, Beth even preached the odd sermon denouncing the work of her salacious alter ego. No-one knew that author and pastor were one and the same.

Then one Sunday morning, Beth – who'd been burning more midnight oil on Angelique than usual – grabbed her notes on the Sermon On The Mount, and, in haste, grabbed the wrong thing...