two girls switch places during WWII

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Loganberry Books: Stump the Bookseller: T (Children's Books 1978 p.3) The cover of the reprint can be seen on Amazon. ... T130: two girls switch places during WWII Solved: Searching for Shona ... logan.com/loganberry/stump-t.html - 231k - Cached -

oh....! found. been making occasional small attempts for years. today prompted by cust lkg for 'Christopher for Congress' about a little boy running.. cldn't find anything, suggested try asking a childrens librarian. then ggl: "children's books" "two girls switch places" war. and found - huh- in exactly the context of booksellers helping find books a person remembers from childhood - this is great:
Book Stumper http://logan.com/loganberry/stump.html Have you forgotten the title of your favorite children's book? This is a service to help solve your book mysteries. Submit your memory here, and see if anyone else remembers your book memory, or better yet, knows the title and author! About Loganberry

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after the (unexpectd) 7yr life trade, girl finds other girl (who living wealthy life) who denies her-- says I dont know you.

what was it about this that so impressed me?