This time it's from a lovely edition of Pushkin's
Ruslan_and_Lyudmila - check Wikipedia for the story, as I'm too lazy to tell it, not that I remember it entirely myself.
The paintings are done in the Palekh style by the artists B. Parilov and V. Dudorov, book published in 1964.
I never much liked this style myself, though the colours are very pretty! (A bit over contrasted on my monitor, however, you might have to turn the contrast down on yours so as not to be blinded.)
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What I like best, apart from the colours on some of these, are the illuminations (in the style of the title page, though with less colours) of the first pages of each chapter. If there's interest, I'll scan those, too.
And in case you liked these, here are some more, from a different artist (A. Kurkin) illustrating different fairy tales by the same author:
here and
here and
here.