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
Clanlands
Sam Heughan, Graham McTavish
Lonely Planet Scotland 13 13th Ed.
Kay Gillespie, Joseph Reaney
