GRATIOT back in the day

I've never seen the parts books used in the O'Reillys around here. I don't think they occupy any countertop space, anymore. All computers and monitors, now. I once saw a guy pull an old catalog from underneath the countertop.
Love the Linda Vaughan pic, headlights and all!

They are not on the front counter. They are on the parts shelves behind the counter. Each volume is about 5" thick with several different product lines. I've never counted them, funny to say, but I think there are around 20 volumes. We update them every month. Of course, each store may vary with that.