@ Tatyana June 17, 2019 at 16:23
I don’t believe there is a Russian translation yet, but I’m sure the authors would be very pleased if one was made and the books printed in Russian. Perhaps you could approach a Russian book printer and suggest he contact the authors to buy the rights for a Russian translation.
Until then, if there isn’t a Russian translation, I think it would be well worth your while trying to plough through them, ‘Hidden History’ first.