Two wheels hooked. That was your vehicle: two wheels on the ground, the other two in the air, safely attached to a bar hooked on both ends to a big truck. Oh, how you hate shredded tires, check-engine lights, busted radiators, dead batteries, and the guy with the rig, but in the new book “The Big Tow” by Ann McMan, a wired starter isn’t the only thing that’s hot.