More to explore:
'Letter' Hand-Carved Book Shelf Art | Nordstrom
Nesting- wooden crates as shelves
DIY painted drawer for a shelf (using for keys/mail/wallet/phone)
tiny drawer display shelves for mugs by My Champagne Taste
scrabble racks as art shelves.
Vintage Window Frame and Shelf Wall Decor by AsIsRepurposedItems
love this idea of turning two shutters into a shelf!