My personal favourite is "Time of Parting" (Vreme razdelno by Anton Donchev), the book is beautifully written and made me cry. There is a film based on the book - "Time of Violence", you can find some excerpts in youtube. Really, really touching...
And I might re-read this book indeed (unfortunately I don't have a copy of "Under the Yoke" right now), thanks for the idea and the challenge : )