I have that same book. I assume since, according to your name, you are yourself a zombie; you are reading that book as a way to counter the measures taken againt you and your kind. Kind of like reading the other teams playbook.
My most recent addition. I've always wanted a Long slide and found this recently and could not resist. Only one range trip so far and found it to be very accurate with zero problems right out of the box. I may send it off for some upgrades later.....................ck