Very different in format from the Oxford Companion to British History I feel this should be reissued with the title "Themes in Scottish History". With this book instead of having an A to Z of items you have a collection of themes and an index.The selection of themes is apparently random so that if you look up Mackintosh in the "themes" i.e. the main body of the book you will find Mackintosh J P but not Charles Rennie. But if you go the index at the back you will find no reference to J P Mackintosh though you will find Charles Rennie but then you have to go to "archtitects, artists and craftsmen;architectural styles and features;culture" to find out more
The content of the book is fine, but accessing it is a nightmare. If you want to know a specific fact about Scottish History I suggest you look it up in the Oxford Companion to British History. You will probably find it there and it will take a quarter of the time.