'Mystic Knoll' by Diana G. Gallagher

A curse was made, an Innocent born--
To darkness her small life was sworn.
Gather the forces, bring them together --
Save this girl from sadness forever!

All vanquishing and no play makes for tired, grumpy Charmed Ones. Paige decides that what they need is a family getaway. She'd love to explore her witch heritage in Salem, but Phoebe and Piper vote for a relaxing beach trip. Luckily, Leo points out, they can do both. They'll spend a day or two in Salem, then the rest of the time on the beautiful Massachusetts coast.

It seems the girls have gotten a break form evil -- but late flights and wrong directions conspire to sidetrack the travelers, and they find themselves hungry, exhausted, and nowhere near Salem. They happen upon a bed-and-breakfast run by a crotchety old woman and her strange, shy granddaughter. They're not your typical innkeepers, and soon Piper, Phoebe, and Paige find that nothing in this small town is typical. It's all a little... well... mystical.

It looks like a working vacation for the Charmed Ones!

Published by: Simon & Schuster New York

Notes:
*Featuring Piper, Phoebe, Paige, Leo, Elise and Wyatt