I have found a lot of links on how to make a recessed bookshelf, but I haven't been able to find anything about how to do it if the wall is already recessed. I don't have much DIY experience and was hoping for something fairly simply, even if it just involves buying a bookshelf, sticking it in the cubby hole, and then putting some trim around it. I just want it fill the whole space and look good.
I included a picture. The recess goes from floor to ceiling with trim/crown molding. Ignore the radon test kit. It is about 1' deep.
Read more: How to build a recessed bookshelf?