Repeat for the opposite side of the book nook. On the revese of these pieces go two uprights to support them forward of the box.
Next decorate the back panel with paper making sure to remove the paper from the round holes and cover both sides.
In the kit there is an odd shaped panel with 3 cut outs - this is the piece that allows you to create the look of the room never ending. I added a piece of acetate sprayed with Pentart mirror mist to this as there is no mirror in the kit. If you are not worried about this effect then I suggest you just leave the panel out and cover the slots on the top and base mdf pieces designed to keep it in place.
This is the opposite side wall. The eagle eyed will have spotted that I have "filled" my libary with tiny books - there are over 140 of them between the two sides and you could quite easily add more. These may be a labour of love but are really quite easy to create: I took a 1.2cm strip of cheap copier paper cut along the short length of the A4 sheet and simply repeat folded it in place - the folds were then glued together in effect making a signature. I then took 1, 2 or 3 signatures and covered them with paper scraps 1.5 cm wide thereby creating the covers for my books. I think I used a total of 5 pieces of A4 copier paper. Once the books were completed I adhered them in place as shown.
Having got this far I could then add the side panels to the box decorating only the inside parts that were going to be visible - ie. the parts at the back of the panels behind the shelves. I At this point I fed small craft lights through the holes and into the back of the book case - I have used a set for each side and would advise if you can you get lights that are as bright as possible and added the back panel and the oblique panel at the same time.
Finally I decorated the back part of the nook which holds the switches discretely before completely the outside parts of the box.
Is this a labour of love - Yes - I think it is probably the most involved of all of the book nooks that are in stock and it was a lot of fun to create.