1"x10" or 1"x12" pine board, planed (i.e., don’t get the unfinished, rough-looking stuff) and as straight and knot-free as possible. You can get your wood at a Home Depot-type place, but lumberyards will have nicer stuff. To calculate how much you’ll need: length=2a+2b+(number of shelves desired)x(a-1.5"), where a= (length of bottom/top piece) and b=(length of side piece). Note: Keep in mind that the longer a piece you buy, the cheaper you’ll be paying by foot, so it’s better to get one 12’ section that two 6’ sections.
8 - 1.5" long flathead woodscrews
16x(# of shelves desired) ˝" long woodscrews
4x(# of shelves desired) L-brackets
handsaw (or circular saw, if you’ve got one)
approximate cost| For a 9’ tall, 1.5’ wide bookcase with 7 shelves, or 4.5’ tall, 3’ wide bookcase with 3 shelves, the cost for materials would be around $30 or so. Hint: Before you begin, draw out your plans for your bookcase on paper, approximately to scale, so you can figure out how to maximize your wood use.