Great advantage of this book - it's written with a heavy reliance on documents from the archives of Warsaw Treaty countries. And for the first time I've seen heavy use of recently declassified Soviet documents (from Ukrainian Military Archive in Kyiv).
The only drawback of the book - it's written in Russian

Here’s a link to the author's web-site: https://warplans.org/
It's bilingual and has some details and excerpts from the book translated into English.
IHMO, especially interesting in this book regarding current situation are plans of Soviet operations in the Black Sea and plans of landings to capture Turkish Straits.