What should I buy first??

I dont know if I should buy a rocking chair or a bookshelf first. I'm trying to get the last 3 pieces of my nursery purchased. Ive already gone without a rocking chair for 2 months so it isnt a big deal to me to wait on it for two more weeks since we get paid bi weekly. But it also is an important piece of furniture so I just cant make up my mind. The bookshelf is part of a set of 3 to match our crib and dresser/changing table. We read her a story every night before bed, so we have a ton of books and will only be getting more. I'm not worried about it falling when she pulls on it because we will anchor it to the wall.