The most widely known works by Diane A.S. Stuckart available in Russian translation include the series, which features Leonardo as a sleuth in Renaissance Italy:
(Russian: Гром среди ясного неба ) — Leonardo investigates a death at a court festival involving his own flying machine invention. Works Under Pseudonyms diana stakkart knigi skachat
Diane Stuckart also writes under several pen names, which may be relevant for your search: The most widely known works by Diane A
(Russian: Королевский гамбит ) — Set in 1494 Milan, Leonardo and his apprentice Dino investigate a murder during a "living chess" game. diana stakkart knigi skachat
Диана Стаккарт – лучшие книги - LiveLib
The author you are looking for is (often transliterated in Russian as Диана Стаккарт ). She is a New York Times bestselling author known for her historical mysteries and cozy mystery series. Popular Books and Series