Used Book From Amazon Came With Bonus Material

[maskedmelonpai]

so i took advice from that one code thread and got some books on puter science to learn things proper liek. so, found lotta texts for free and stuff online, butt also boaight a few on amazon (i liek having things in my hands). anyway, two books arrived yesterday, one unremarkable, the other, had lotta things in it for bookmarks, liek, restaurant receipt, old test, napkin (w/ notes) envelope (w/ addresses) from what seems to been a card or something. made me wonder if the book had been stolen or what the heck. seemed odd to me that someone would leave so much identifying info in one spot and then sell it online.

Anyone else ever encountered this?