Simple notebook (as can be found in dollar stores, etc.)
Harry Potter image from a calendar, desk calendar, or even the internet
Mod Podge glue
Apply a coat of Mod Podge on the notebook.
Place the picture on the layer of glue, then apply another coat of glue. Be creative and try to create nice designs if you wish.
Apply a second coat of Mod Podge on your pictures.
Remove all the air bubbles and let the glue dry completely.
If there are some pieces sticking out, cut them using scissors.
© Yamwam's tutorial was taken with permission.