Not what you are suggesting, but if you click on the Move Book drop down on the right you can see where the book is currently shelved. Having a shelf column would be good. It would need to be able to deal with books that are on multiple shelves though (from a layout point of view).

Right, that's a workaround.

But can books be on more than one shelf? I just tried moving a book to a different shelf and it removed it from a previous one. At least I think that is what happened. It's actually kind of confusing. Move implies a "remove" from it's previous location.

But yes, indeed, if books can be on more than one shelf the column would have to indicate all of them.

Not with the built-in shelves I don't think. But if you move a book to a custom shelf it isn't removed from, e.g the reading shelf. Whether this is intended or a bug with the move functionality I'm not sure!

Right. I have explored a bit more of the move thing (which, for the record, is not directly related to this issue) and indeed "moving" a book to another custom shelf doesn't move it, it just adds it to the shelf. It does seem that the concept of "shelves" is not completely appropriate since a book in real life cannot be on two different shelves unless you own two copies. :-) Really they are categories.

See also this issue I just created for moving books if you are interested: #2485