Scottish Reads?

Last year, in preparation for an Irish vacation, I read a fare number of Irish works. I covered everything from medieval texts to 19th and 20th Century classics (Yeats, Wilde, Joyce, etc) to contemporary authors such as Paul Murray and the ubiquitous Sally Rooney. It was fun and really made the trip into something special.

I'll be heading to Scotland on my next international vacation. Any recommendations? I usually read literary fiction, but have pretty catholic tastes.