@secretdream:
Since font embedding can be a bit tricky, I created a template file with an embedded Deja Vu Sans font (which can be freely distributed). You can use this file to test whether the Nook supports embedded fonts.
If all Turkish characters are displayed OK, you can use this template to create your own ePub. Simply create a copy of this file, open it in Sigil in Book View mode and replace my text with the text from your document.
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