Eloise at Christmastime by Kay Thompson and Drawings by Hilary Knight, published by Simon & Schuster Books for Young Readers, first published in 1958, this copy published in 1999. There is no dust jacket.  The cover and interior are clean. 

From the First Page of the Book

Once there was this little child

You know her I believe

Here's who she is me ELOISE

And it is Christmas Eve...