When you’re the one that owns all of the books out of your group, you often find them coming up missing. Every time a movie comes out based on a book, my best friend borrows the book from me and it disappears for about 6 months if not longer. I’m still missing the first book out of my Legends of Narnia book set that I’ve had since I was a kid, but I’m not bitter. Those of you in the same boat need this Personal Library Kit to let them know when the book needs to be returned. In my case I think I need a book that has an alarm that kicks on after a certain amount of days have passed and doesn’t turn off till it’s returned to its rightful owner. This Library Kit works for the subtle approach though. You can purchase the kit for $14.99 and the refills for $5.99 through Think Geek.