Sarah hates Camp Cold Lakes. None of her bunkmates like her. To get their attention, she pretends to drown in the cold, slimy lake, but that doesn't end up being such a good idea. A ghost named Della has other plans.
In book two in the classic fantasy series, The Chronicles of Narnia, four children are evacuated to an English country house during wartime. They discover Narnia through a wardrobe in one of the bedrooms.