MarshalBraginsky
Banned
That's interesting. Do you remember where you read it? And it's not entirely unfeasible. After all, it was annexed to the RSFSR, without sharing a common border and Belarussia is even closer. And it's possible even to have a land connection between Belarus and Eastern Prussia. In the initial partition the Soviet Union controlled the Byalistok region and annexed it to the Belarussian SSR, which thus had a common border with East Prussia (see this map; the blue line shows the prewar border and the red line shows the dividing line between the German and Soviet zones). Of course this would require screwing up Poland even further, as they would have to lose not only their part of East Prussia, but also the Byalistok region and presumably also the area around Suwalki.
The title of the book was the History of Belarus.