Cutting a Recess In Shelves to Accommodate the Back

I'm building a bookshelf and the back doesn't extend the whole width of the shelf. This is mostly a note-to-self on how to cut a recessed area in the shelves to accommodate the back.

I want to use my router table for a clean cut on the veneered shelves. For the top and bottom shelves, I route a stopped rabbet cut.

For the middle shelf, do the same cut as the top shelf. Then using a straight bit with a bearing, cut the recessed area to the other side of the shelf. Square the corners if needed.

The whole process literally takes minutes.