Good Tracker for Ukrainian and Russian Content

What's a good source of Ukrainian and or Russian content, preferably ebooks and audiobooks? We're trying to source some content for some recently displaced and re-homed Ukrainian refugees we're are helping. To give them something to occupy their minds while they're navigating all the governmental red tape. I searched around and all I could really find is trackers in Russian but only offering movies in English dubbed in Russian. Any thoughts or direction would be greatly appreciated. Thanks!

I know it's probably late, but I'd say try RuTracker.org. They are more an archive than a release place, deffo has some literature in Russian there. Sometimes audiobooks pop up even faster than e-variants.