These are the books I refer to when researching Romans in Scotland. Many of them are heavy reading as they are written by professionals for an academic audience. There are a number of Free Books on the Romans in Scotland to download and read.
Books to buy (click on the image to get details on Amazon, publisher or library)
I like using Amazon kindle as I can search for keywords across all books and take many books with me when I travel. You can borrow all these books from your local library and find where there is a local copy at https://www.worldcat.org/ The authors also get paid for these loans.
Note the links above have an Amazon tag on them which means I get a small % if you buy them but it doesn’t cost you anymore. Go to Amazon direct if you do not agree with this.