Start with high-confidence western europe travel books, then narrow by subgenre or adjacent topics.
Alpine Cooking
Meredith Erickson
Lonely Planet Western Europe 15 15th Ed.
Catherine Le Nevez, Isabel Albiston
Lonely Planet Pocket Madeira 5 5th Ed.
Austin Bush
Lonely Planet Pocket Lisbon 6 6th Ed.
Sandra Henriques, Joana Taborda