it's not near a window, but the bottom right corner of the bedroom might work...
or maybe the bottom left corner of the living room, by the window. still leaves you room for a couch facing the fireplace and maybe another chair or 2 seater between the couch and reading nook.

I would center a couch facing the fireplace, out in the middle of room. Anchor it with a rug and a sofa table and put a pair of chairs on either side of the fireplace. Then position your reading chair/ottoman in the corner behind it next to the window. I would put the tv on the long wall to the right of the front door so it can be watched comfortably either lying on the couch or from the chair to the left of the fireplace. You could also make the reading nook to the left of the fireplace to take advantage of light from the balcony, warmth from the fire, and a view of the TV.

PS How do you rent a condo?

Bedroom is too small, I think it would have to go in the living room. I'd put the flat screen on the living room wall to the right, put the couch facing the tv but beside the fireplace (so the fireplace is to your left if you're sitting on the couch) and then tuck a chair and little table + reading light into the bottom left corner by the window, behind the couch. This also leaves the bottom wall open for bookcases, etc.

You rent a condo the same way you rent a house; sign a lease and move in.

I want to know, what is a country kitchen?

I'd put it in the bottom left of the living room - really, the only "corner" you've got, with a bookshelf on that bottom wall. Couch can go on the bottom wall or on a line with your linen and front closets, creating kind of a front hallway. Looks like you've got room next to the fireplace for the television.

I think your reading nook is at the bottom left corner of your layout above, i.e., right by the window on the same side as the balcony. Put your favorite reading chair and ottoman there, and to give it a true nook feel, separate it from the rest of the living room with a low open shelf -- low and open so it doesn't block off the natural light from the window. I would position your TV on the wall across the fireplace, and the sofa perpendicular to it (i.e., facing the window), with a narrow console table behind the sofa so that it becomes the landing strip for your bag, mail and keys as soon as you enter your apartment. You can then position the coffee table and another ottoman between the TV and the fireplace, or between the sofa and the reading nook shelf.

I know this might seem weird to a lot of people, but have you thought about having your reading nook in the kitchen? It looks like the kitchen has the most window space, so that may be the best light in the apartment. It also looks like you'd have room for it in there, unless you need to have an enormous table.
My mother has a small seating area in her kitchen, and she absolutely loves it. I swear she doesn't even use the other rooms in her house.

"what is a country kitchen?"

It's a rather archaic real-estate term meaning "Eat-In Kitchen"

I agree w/ the others that you set up your main seating area w/ a pair of loveseats facing one another in front of the fireplace, and your chair in the lower LH corner of the room by the windows...
...and the TV goes above a narrow shelf on the wall opposite the fireplace - and a credenza goes on the wall at the right end of the room with a mirror above to catch mail, etc.

The most important thing about a reading nook is comfort. A few things you should consider (that may help shape where it goes) are:

1) do you like to feel secluded when you read? *(put it in a far, closed off corner of the bedroom)

2) do you like to read in the open, without being removed from what's going on? *(try the corner to the left of the fireplace, across from the balcony)

3) when do you read? During the day (by a window) in the evenings? (corner with a lamp)

4) if space is limited - which it looks like it is, can you be happy reading on the sofa so you don't utilize part of your footprint for a single use?

Given the size of the room and the traffic pattern, it might be nice to make one end of a sofa your cozy reading place. By placing a sofa on the wall opposite the fireplace and adding an end table on the left for a lamp you will be able to enjoy both the light from the window and a view of the fire. You could easily add an ottoman that would double as a coffee table. A pair of smaller scale chairs on either side of the fireplace will make a nice set-up for entertaining. You don't mention if the cable is already in place...if not then it should ideally be on the wall to the right of the front door. It could sit on a console or dresser if you can't mount it to the wall. The console would also provide storage. A floor lamp to the right of the sofa will provide more light.

looks like all the options that ran thru my head were nicely covered. Now, what I want to know is what you finally do! lol

since your reading nook is an important place to you, create your nook where you will be most comfortable - then plan your space around it!

you wanted it beside the window, so i would put your club chair and ottoman along the window/balcony wall. and i would place bookshelves along the entire wall which faces the fireplace. this would be ideal, obviously to house your book collection, AS WELL as store and display accessories and homewares.

then create the main seating area around the fire place, mounting the tv above the mantle and anchoring that space with the use of a rug.