We want to make it possible to submit series of images into the gallery so that there will be 'previous' and 'next' links when they are viewed. One possible approach is to use taxonomy terms for that, but authenticated users should be able to create those terms without having full administration privileges on taxonomy, and also other users shouldn't be able to submit images with those terms (might be tricky). Books could be used but they are not integrated with the gallery, and they are collaborative by nature as I understood. So maybe a kind of multi-image node would be better?
With just single images, regardless of problem mentioned above, is there an easy way to put 'previous' and 'next' links to other nodes with the same term?