We've just enabled a new feature in Catalogue Plus which is now under testing. When you look at the full display for a book there is now a 'Find it' button on the right of the screen next to its location and shelfmark.
Click on this and you'll see a map of where it is in the library, which should make it easier for you to find it:
This feature works on most modern browsers, and for Catalogue Plus and the Classic Catalogue. We hope you find it helpful, and please let us know what you think of it.