Ikea LACK wall shelf unit, 30x190 cm, black-brown : Amazon.co.uk: Home & Kitchen
Ikea KALLAX shelving unit black-brown (77x39x147 cm) 8 shelf : Amazon.co.uk: Home & Kitchen
BILLY black-brown, Bookcase, 80x28x202 cm - IKEA
KALLAX black-brown, Shelving unit, 42x147 cm - IKEA
My wife wanted to replace this old $150 Ikea bookshelf so I made a Monticello-style stacking bookcase out of walnut/jatoba/maple for the low low price of only $1k : r/woodworking
Pack of 3 IKEA Solid Wood Storage Shelf Wall Storage Book Shelf Brown 70x9x16cm | eBay