Charlotte Sometimes

Charlotte Sometimes
by Penelope Farmer, originally published in 1969.

Summary
After Charlotte's first night at boarding school, the view from the window has changed and the girl in the next bed is not the girl who was there last night. She is a stranger who calls Charlotte "Clare" and says she's her sister. Somehow, Charlotte has slipped back to 1919 and is someone else.

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Keywords: Boarding School, Time Travel

Character Names: Charlotte, Clare