Bookstand ; Leaning against the wall Type

This is a simple Bookstand ; a type leaning against the wall.
So, we need a wall to lean on, such as a reading room desk or a monitor.
It's simple but can keep books stable with two paper presser foot.
the additional presser foot end for a thin book is optional.

You need m3x25 cap screw and Hexagonal nut(2 pcs) or pointed screws are also fine.
To prevent slipping, I used glue on the floor. You may attach a rubber or non-slip pad to the floor. (Place the stand over the wet surface before