natashavc:

Inside the book were actual envelopes! Different colors and textures. And there were LETTERS, actual letters, in the envelopes. And you would read the letters that Goldilocks wrote to the three bears, Cinderella to her prince, Hansel and Gretel back to their parents etc. Oh, jesus, this was my favorite book growing up. Sometimes I would take a letter out of the envelope and take it to school. I’d read it under my desk as a treat.

I used to take the letters out, place them into an envelope, and force them on my father in the morning so that he could attach a stamp and mail them.  Of course, they were all addressed to me, and it was always exciting getting them back, at which point I would place them neatly back into the envelope within the book.

My particular favorites were the witch’s magic supply catalog (which I used to fill out several order forms of my own design), and the one with the money (which I would include with the order form to pay for my Eye of Newt).

My copy is still sitting rather prominently on a bookshelf at my parents’ house.  I read through it just a few weeks ago.