We installed many floating shelves, and for this particular house in Kotte, we installed a lot 🙂

A floating shelf is a form of the shelf with its wall fixings hidden within the shelf board, with no visible supporting brackets. A floating shelf may have two or more channels open from the back towards, but without reaching, the front, into which slide fasteners attached to the wall, typically held in place by screws inserted through the bottom of the shelf.

Floating Book Shelves