Start with high-confidence eastern europe travel books, then narrow by subgenre or adjacent topics.
In Europe's Shadow
Robert D. Kaplan, Paul Boehmer
Rick Steves Europe Through the Back Door
Rick Steves
Rick Steves Spain
Rick Steves Italy
Rick Steves Greece
Rick Steves, Cameron Hewitt
Germany - Culture Smart!
Culture Smart!, Barry Tomalin
Finland - Culture Smart!
Culture Smart!, Elena Barrett
