Haven't read that Lawrence Clayton book, but I have these two and they're excellent
Contemporary Ranches of Texas with photos by Wyman Meinzer
Ranches across Texas: Alta Vista, Canales, Catarina, O'Connor, and Ray in South Texas; R. A. Brown, Chimney Creek, Goodnight, J A, Moorhouse, Nail, and Renderbrook Spade in the Panhandle and Northwest Texas; and Henderson Cove, Hudspeth River, Long X, and Hoskins 101 in the Trans-Pecos
31 Clear Fork Chronicles Stories from the ranches and cowboys of the Clear Fork of the Brazos - I remember this being very good