Also on these boards
Hold on Tight bookshelf by ColleenAndEric.com - Even in the digital age, we all still have personal libraries of books we just can't let go of. Use the Hold on Tight bookshelf to keep your most treasured books upright, on display, and close at hand. A brightly-coloured aluminum cube and oversized wing nut serve as a sliding bookend which can be adjusted and secured wherever it is needed, whether your book collection is growing or shrinking. Offered in Beech, Walnut and Oak. (41"L x 11"H x 8"D).
There is no tutorial. These are a purchased item at this link. I like this idea for a nightstand by the bed. 8"x8" routered boards with 8" gap between shelves.
Corner shelves, I love how You can but a small corner in a really good use. I don't like a shelf facing only one side in a position like this and tall self would eat up the air around it, so I love it!