The Hornby Railways OO Gauge Track Plans 7th Edition Catalogue from 1989 provides detailed track plans and information, offering a comprehensive guide to building and expanding model railway layouts in OO gauge. There are 20 layout plans which list all the component pieces needed to recreate each layout. There is a small amount of paper loss on the rear of the outer cover, as shown. Please see the photographs for condition and detail. Ref: R.160 1989.