Start with high-confidence eastern europe travel books, then narrow by subgenre or adjacent topics.
World Travel
Anthony Bourdain, Laurie Woolever
In Europe's Shadow
Robert D. Kaplan, Paul Boehmer
Rick Steves Europe Through the Back Door
Rick Steves
Rick Steves Spain
Rick Steves Greece
Rick Steves, Cameron Hewitt
Home Base Hiking Europe
Cassandra Overby
Germany - Culture Smart!
Culture Smart!, Barry Tomalin
Finland - Culture Smart!
Culture Smart!, Elena Barrett
