[wasja79]

It's True, Thanks!

MOBI -> EPUB ->MOBI works, but Kindle-specific formatting is destroyed. Perfectly solution is grouping by first letter in MOBI catalog for non-latin characters too!

Here are examples for russian characters and three dummy mobibooks with russian metadata:

А а Б б В в Г г Д д Е е Ё ё
Ж ж З з И и Й й К к Л л М м
Н н О о П п Р р С с Т т У у
Ф ф Х х Ц ц Ч ч Ш ш Щ щ Ъ ъ
Ы ы Ь ь Э э Ю ю Я я

If it is possible, this would be great!

Regards