Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Can the books for the Nook be purchase on Amazon or do we have to go to Barnes & Noble?
Document: ?I have been in conversation with Barnes & Noble management ("object key": 28817953) and they have refused to offer a valid solution to my problem.In short, don't purchase a Nook, they freeze all the time. Go with the Kindle. It works much better and ours has never frozen.
I bought this Nook Simple Touch on Amazon.com, but when I received it, the WiFi would not connect. I tried my home network as well as several WiFi hot spots around town. Barnes & Noble Customer Service was NO HELP, telling me that, since I did not purchase the Nook Simple Touch from B&N;, they could not help me, and suggesting that I needed to return it to the seller.
I purchased this device having read half a dozen reviews, and the reviewers all commented on how comparable the book selections for Amazon and Barnes and Noble are, but the truth is, B&N; still has a ways to go.I am aware the the Nook supports e-pub which allows it to read generic pdf files (something that the Kindle can't do), but one of the features I look for in e-readers is convenience.
Been in the market for an e-reader, I have tried to read on a tablet and it really just tires my eyes. Really when you are looking for an e-reader there are two brands you look at: Amazon and Barnes & Noble. I have tried both and you really can't go wrong with either reader.However, the Nook Touch is currently the best e-reader available because of two major features:1. Touch screen2.
Make it simple the Nook is a better e-reader. True, it does not have 3G, but my Kindle touch 3G stopped working almost right away and the 3G is only good for Amazon purchased content anyway.Moreover, nothing beats being able to go to Barnes and Noble to get customer service by an actual person instead of being transfered 3 times before reaching a semicompetent customer service agent.
I love my Nook simple touch but will review another time. Right now I want to alert everyone not to buy your Simple  Touch from Amazon. While I love Amazon, I thought I would use my gift cards to purchase my Nook from them rather than going directly to Barnes & Noble. Was directed to several dealers and selected Ricks Collectibles who had a great rating. My Nook came quickly and everything seemed OK until I tried to purchase the extended coverage.
It's best to buy this device directly from Barnes & Noble, either the store or the website. I know Amazon won't let me list prices, but at the time I'm writing this the current "list price" is 40% higher than the actual in-store price. Even with Amazon's current discount, it's higher. Buying at the store also gives you the opportunity to purchase the extended warranty, which protects your NOOK from drops and liquid spills, etc, for two years.
Like the Sony reader, the nook can take notes but wouldn't be a great device to purchase for that purpose.It was pretty easy to set up- I didn't read the instruction manual, but I usually don't. I just followed the on screen instructions to connect it with my internet, my barnes and noble account, and then plugged it into my computer to sync it with library books.
* I can read my Kindle books on my BlackBerry;  Barnes & Noble Used to support BlackBerry but recently chose to abandon us. * I have had the unfortunate experience of dealing with B&N;'s customer service. From this one user's experience: if you go with Nook, hope that you won't need their customer service.
The advertised size of the nook is 2gb, which is a ton of books, but it wasn't enough room for the books I've acquired through other sources- like google book downloads. A quick google search solved this problem- barnes and noble appropriates the majority of this space for content you purchase directly from barnes and noble. Fortunately there is an easy solution- there is a slot for a microSD card, and I happened to have a 2gb one lying around- plus they only cost about $5, if that.
Answer: You can purchase the kindle versions of books on amazon and pretty easily get them onto your nook. Basically you download the amazon kindle desktop reading app, download the books you want to your pc, and find the folder that they are in. Then you download a free and very popular e-book library management program called calibri and a plugin for it that lets it decrypt kindle files. All you have to do from there is go into calibri's settings and point it to the kindle directory on your pc and it will import them and you can put them onto your nook using the calibri interface. There are guides out there that lay it all out and have screenshots, so literally anyone can do it, and calibri is worth having for anyone with a serious e-book collection anyway as you can tag books with all sorts of info to help you find them easier.