Schiffer Publishing, Ltd. has books on hot wheels. Hot wheels 1968-1972 is a welcomed 224 page version to die-cast toy car literature by one of the world's foremost experts in the field with more than 215 color photos. Marketed as the ‘fastest metal cars in the world,’ hot wheels revolutionized the die-cast toy race car market. The 118 unique castings produced during this four-year period are explained in detail and a complete variation and price guide is provided to expand knowledge and interest in collecting these racing toys.