Start with high-confidence scottish history books, then narrow by subgenre or adjacent topics.
Century of the Scottish People: 1830–1950
T. C. Smout
Mary Queen of Scots
Antonia Fraser
Before Scotland
Alistair Moffat
Outlander Trivia: a Card Game
Diana Gabaldon
The Royal Stuarts
Allan Massie
Clanlands
Sam Heughan, Graham McTavish
Rick Steves Scotland
Rick Steves, Cameron Hewitt
Lonely Planet Scotland 13 13th Ed.
Kay Gillespie, Joseph Reaney
