The SIMBook Address Book is the geekiest address book you’ll ever see. Designed to look like a giant SIM card, this notebook has room for you to store all your written-by-hand contact details. In case you aren’t familiar with SIM cards, they are tiny chips used inside GSM phones that are used to store contacts digitally. The idea here is that if your phone should go missing and along with it all your contacts (heck, we’ve all been there), you’ll still have a good “old fashioned” backup of your contacts handy. The SimBook Address Book Notebook retails for $5.80 at Fractalspin.