These instructions are for the 2nd Edition Nook, the one with the touch screen.
To make this sleeve, you will need two coordinating pieces of fabric (1/4 yard each), some fleece or felt to use as batting (1/4 yard), and some velcro.
There are two versions shown here. One with a flap closure (on the right) and one with a tab closure (left).
To make the one with the flap, place the fabric together with right sides facing. Place on top of the fleece.
Cut out the material 18" long by 7" wide. On one end, from 3" from edge, cut a diagonal 2" in on each side.
Sew each end using a 1/4" seam. Turn right side out and press seams.
Cut a 2" piece of Velcro and sew the "hook" piece to the 'inside' of the flap. Then fold the sleeve with the 'insides' facing ('outsides' of sleeve outside) and position the "loop" piece to the outside of the case. (Double check position folding flap over.)
Unfold the sleeve and sew the "loop" piece to outside of the sleeve.
Place the right sides together, leaving the flap out, and sew the sides together, using a 1/4" seam. Turn inside out and press. Voila! Your Nook has new clothes!
To make the version with a tab closure, the instructions are pretty much the same except you cut the material as a 7 x 15 inch rectangle. Cut a second piece of of material, right sides together (without the batting) 3" long x 4" wide.
Using a glass or cup as a guide, round off the ends on one side.
Sew the edges with a 1/4 seam leaving the unrounded edge open.
Cut several little snips around the rounded edge, careful not to cut the stitches. Turn inside outside and press flat.
Cut a small square of Velcro and sew "hook" piece to the 'inside' of the tab. Sew a button on top of the outside of the tab to hide the stitching from the Velcro.
Turn right side out and press seams open.
Fold the sleeve in half (right sides out) and with the tab in place, position the "loop" piece of the Velcro to the outside so the tab will properly close. Unfold the sleeve and sew the "loop" piece in place.