Not so scary..

Haunted Scottish Castles and Houses - G.  Stewart

Short overview of the castles and houses that line the Scottish countryside that have some sort of legends attached to them. More history than anything else is given in this book. This would be a great starting point for anyone wanting to delve deeper into the history on some of the houses and their occupants. There seem to be quite a few good stories that are lurking, but the author did not take the time to delve into them on a deeper setting.