A corner shelf or set of corner shelves are not complex build projects, especially if you have decent corner shelf plans.
Always read the corner shelf plans carefully and make sure that there is enough information provided for you to be able to complete the project - before you invest in materials. Some of the plans are excellent, giving a great deal of instruction in text, pictures and drawings while other plans are only drawings and still others are only sketches.
As well, some of the free corner shelf plans require a woodworking shop that is outfitted with a good selection of stationary power tools such as a drill press, jointer and thickness planer.
These corner shelf plans are for the novice to intermediate woodworker.