[Heathside Boy]

There is surely an easy answer to this but I cannot find it.

Looking at my collection of books within Calibre, they are all over the place and not filed together as tidy selections.

For example; I can see two Harry Potter books at the top, two halfway down and the others scattered all over the place. Ben Bova novels are also scattered all over the place and some Stephen King novels are together but others are scattered.

Can anybody tell me how I keep sets of books together when filing for easily locating?

Thanks

HB